Answer:
True
Explanation:
is a substance doesn't always have the same chemical composition is it still considered a mineral
Answer:yes
(: did this help?
why do different atoms give off different colors of light
When heated, atoms give off different colors of light because different atoms emit different colors when the electron jumps from their ground state to a higher energy level, this is called excitation. When electrons move energy levels, a photon is given off (this is emission) and photons have different wavelengths and frequencies so they will have different energies that produce different colors of light.
i hope this made sense! sorry haha
Help ya girl out please and also please don’t put idk
Answer:
It is C :P
HOPE IT HELPS U!
A crystal is placed in a graduated cylinder containing 27 ml of water. the water rises to 60ml. what is the volume of the crystal?
Answer:
The answer is 33 mLExplanation:
The volume of the crystal can be found by using the formula
volume = final volume of water - initial volume of water
From the question we have
volume of crystal = 60 - 27
We have the final answer as
33 mLHope this helps you
Answer:
33 ml
Explanation:
60 - 27 = 33 ml
☺️Hope this helps☺️
True or false? Object A is much larger than object B, but both are made of the same material. If both objects are at the same temperature, the thermal energy of object A is the same as the thermal energy of object b if it were false what would the answer be changed to
Answer:
Thermal energy is the internal energy of molecules. When we heat an atom then the atoms start to vibrate more rapidly. More is the size of atom, more easily the particles can vibrate. Thus, greater is the size of atom greater will be it is thermal energy.
Whereas particles in a small atom will vibrate with difficulty as less space is available for movement. Therefore, less heat will be enough for collision pf particles. As a result, thermal energy will be less.
Thus, we can conclude that the statement if both objects are at the same temperature, the thermal energy of object A is the same as the thermal energy of object b is false.
Silver chloride (AgCl) is used in antimicrobial products such as personal deodorants. Based on the Types of Bonds Lab, what type of properties would you expect AgCl to have.
Answer:
yesss again dobu wanta ti play online
A student made this mode using paper molecules and a piece of yarn. She want to shows how simple transport works. if the model starts as shown above, wha should the final model look like?
Answer:
I think the correct answer is B.
Explanation:
It was approved for me! Hope it helps.
According to the concept of diffusion, the final model would look like B as it has equal number of molecules on either side.
What is diffusion?Diffusion is defined as the process of movement of molecules which takes place under concentration gradient. It helps in movement of substances in and out from the cell.The molecules move from lower concentration region to a higher concentration region till the concentration becomes equal.
There are 2 main types of diffusion:
1) simple diffusion-process in which substances move through a semi-permeable membrane without the aid of transport proteins.
2) facilitated diffusion- It is a passive movement of molecules across cell membrane from higher concentration region to lower concentration.
There are 2 types of facilitated diffusion one is osmosis and dialysis.
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WILL GIVE 15 POINTS
What are the reactants in this chemical reaction?
C2H4O2 + NaHCO3 -> NaC2H3O2 + H2O + CO2
Answer:
This reaction is called an exothermic reaction. In Part B of this activity, baking soda was added to vinegar. Baking soda reacts with the vinegar to produce carbon dioxide gas, sodium acetate, and water.
Explanation:
are all microscopic the same size?
Question 1 of 10
A wave traveling through air meets an object and passes through it with no
change in speed, energy, or direction. Which statement best describes what
has happened to the wave?
O A. The wave was absorbed by the object.
O B. The object's surface reflected the wave.
O C. The object caused the wave to refract.
O D. The wave was transmitted through the object.
SUBMIT
Answer: b, the object reflected the wave.
Answer:
the wave was transmitted through the object
Explanation:
i need help im stupid
Answer:
physical property
Explanation
Answer:
Helium is a chemical element with symbol He and atomic number 2. Classified as a noble gas, Helium is a gas at room temperature so in result a physical property.
And BTW, your not stupid everyone is smart they just have to apply themselves and give it their all!
best wishes!!
electron negativity
Answer:
Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. The Pauling scale is the most commonly used. Fluorine (the most electronegative element) is assigned a value of 4.0, and values range down to cesium and francium which are the least electronegative at 0.7.
Explanation:
Please mark as brainliest
Answer:
What is Electronegativity?
Electronegativity, symbol χ, measures the tendency of an atom to attract a shared pair of electrons. An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.
How do you find electronegativity?
On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group. As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.
Example of electronegativity
Water, a Polar Bond
Hydrogen has an electronegativity of 2.0, while oxygen has an electronegativity of 3.5. The difference in electronegativities is 1.5, which means that water is a polar covalent molecule
What causes electronegativity?
Electronegativity increases as you move across the periodic table from left to right. This occurs due to a greater charge on the nucleus, causing the electron bonding pairs to be very attracted to atoms placed further right on the periodic table. Electronegativity decreases as you move down the periodic table.
What would happen to the density of an object if the volume increases but the mass stays the same
decrease
Explanation:
We all know, Density = Mass/ volume. When volume increases and the mass remains the same , the density will decrease considerably
Answer:
The density decreases.
Explanation:
Think of a balloon. It is tied up. It has air inside. If you heat the balloon up, it expands but the amount of air inside the balloon stays the same. Therefore, there is less air per cubic millimetre, making it less dense.
Which description justifies why the theory of evolution is a theory and not a law? (4 points)
a
Explains how organisms change in response to the environment
b
Predicts which organism is best suited to the environment
c
Supported by a small amount of empirical evidence
d
With more evidence, it will become a law
New substances are always formed when matter undergoes a ___.
Answer:
Chemical Change
Explanation:
Also known as a Chemical Reaction, this is when a substance reacts to something else, changing its Physical and Chemical Properties.
The number of each period in the modern periodic table
represents the number of
Periods are the horizontal rows of the periodic table, with each period number indicating the number of orbitals for the elements in that row.
What is periodic table?A periodic table, also known as an elemental periodic table, is a tabular representation of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is widely regarded as a chemistry icon.
The arrangement of the periodic table also allows scientists to detect trends in element properties such as electronegativity, ionization energy, and atomic radius.
Periods are basically the horizontal rows. Periods represent the relationship of orbitals, or likely areas where electrons will be found, inside the atom's outermost shell. The periods correspond to atoms with a more electron-rich core of inner shells.
Thus, the number of each period in the modern periodic table represents the number of orbitals.
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How do you start the reaction in a glow stick
Answer:
crack the glow stick.
Explanation:
it breaks the glass inside mixing the 2 chemicals. which makes it glow
Volcanic belts form along a. islands in the Pacific Ocean. b. North American mountain ranges. c. the boundaries of Earth's plates. d. the coast of Antarctica. Please select the best answer from the choices provided
Answer:
a. islands in the Pacific Ocean.
Explanation:
A volcanic belt is a large region of intense volcanic activity.
We can clearly see that volcanic belts are regions where volcanic activity is maximum. Volcanic belts are characterized by eruptions of gases, ash, rock, lava etc.
Such eruptions push magma to the earth's surface at high temperature. The area around the Pacific that is prone to volcanic activities is generally referred to as the 'ring of fire'.
Along the boundary of the Earth's plates, volcanic belts develop. Huge chunks of the crust diverge (pull apart) or converge (push together) at plate boundaries. Because of this, the crust frequently breaks, enabling magma to rise to the surface. It is formed along islands in the Pacific Ocean. The correct option is a.
The Alpide Belt, which spans from the Azores through the Mediterranean and Middle East to the Himalayas and Indonesia, where it joins the Circum-Pacific Belt, and the Circum-Pacific Belt itself are the two main seismic belts that encircle the Pacific Ocean.
On land and in the oceans, tectonic plate boundaries are home to the majority of the planet's volcanoes. Volcanoes on land develop when one tectonic plate slides beneath another. A thinner, heavier oceanic plate typically subducts beneath a thicker continental plate.
Thus the correct option is a.
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The iron cube and water in this system are at the same temperature.
a. Which particles have higher average kinetic energy?
A The water particles
The iron particles
They both have the same
Answer:
They both have the same temperature.
Explanation:
When two or more substances of different temperature are mixed, heat is transfered from hot to clod substances till they attain thermal equilibrium i.e have the same temperature
does the axis tilt change or stays the same is space ?
stay the same
Explanation:
Answer:
The axis is tilted in the same direction throughout a year; however, as the Earth orbits the Sun, the hemisphere (half part of earth) tilted away from the Sun will gradually come to be tilted towards the Sun, and vice versa.
Explanation:
hop this helps!!
Each proton and each neutron contribute ________ amu to an atom. Amu means __________ ___________________________.
Answer:
Each proton and each neutron contribute _atomic mass_amu to an atom. Amu means _ unified atomic mass unit_
Each proton and each neutron contribute atomic mass amu to an atom. Amu means unified atomic mass unit.
What are protons, electrons, and neutrons?Protons, electrons, and neutrons are the charged particles that are present in the atoms. They together made up the atom. The atoms contain a nucleus in between and around the nucleus, electrons are present.
Atoms also contain different shells of different energy levels. In these orbitals or shells, electrons, protons, and neutrons are present. These particles are of different energy levels.
The atomic mass is made up of a total of protons and neutrons. The atomic number is the number of protons.
Thus, each proton and each neutron contribute atomic mass amu to an atom. Amu means unified atomic mass unit.
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For everything I answer for y’all can y’all do this for me plz
Answer:
GREETINGS!
in phenomenin 3
phase change vapourization
1st liquid
2nd gas
When u give heat to the liquid their Kinetic energy increases when their kinetic energy increases they collide with eaxhother and move farther away resulting in escape of particles in from of gases
In phenomenon 4
phase change freezing
1st liquid
2nd solid
when temperature decrease the kinetic energy of particles decreases in result particles come close to each other and they convert into solid that is freezes
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PLEASE HELP!! 20 Points for Brainiest!
Which element is a metal from the lanthanide series?
rutherfordium (Rf)
americium (Am)
mendelevium (Md)
dysprosium (Dy)
Answer:
dysprosium (Dy)
Is a metal from the lanthanide series.
Explanation:
Which of the following elements has the smallest
atomic radius?
O a. chlorine
O b. sulfur
O c. selenium
O d. bromine
Answer: It’s A. Chlorine
Explanation:
Chlorine has the smallest atomic radius among the given elements. Therefore, option A is correct.
What is the atomic radius?The atomic radius of an atom can be defined as the shortest distance between the center of the nucleus and the valence shell of the atom. An atomic radius can be described as half the separation between two atoms of the same element bonded together.
In general, the atomic radius reduces as we move from left to right in a particular period on the modern periodic table because while moving from left to right in a particular period, there is a rise in the effective nuclear charge. In periods, the new electrons enter the same electron shell.
The atomic radius increases when we move down a particular group because of the addition of a new principle shell.
Chlorine is present after the sulfur at the end of the same period. Therefore, Chlorine experiences a more effective nuclear charge than sodium so it has a smaller atomic radius.
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A certain atom has 13 protons, 14 neutrons, and 10 electrons. What is its charge?
Answer:
+3
Explanation:
there are three more protons than electrons so positive 3
explain what is random motion of particals
Answer:
Also known as Brownian motion
Explanation:
If you take a gas particle and drop it in a container, you will observe under a microscope the particle will be moving in a random pattern. Eventually it will collide with another particle. They are free to move. Each particle has it's own kinetic energy.
They can be described as small, discreet and meaning all the particles are separate. They will not stick together.
The path these particles take is random.
Example: Dust particles move randomly. The reason why the dust particles more randomly is because of the air or gas between them. You can observe dust particles in the air when you are looking in the sun light but you don't see the air molecules. It appears the dust is doing the moving but it's the gas in between them that is moving them.
Another example is : Pollen in water also moves randomly in water. Each water molecule is too small to see, but you can see the pollen moving because it is bigger. This is the Brownian motion.
PLEASE HELP ME ON THIS QUESTION
Answer:
(B)
Explanation:
Answer:
When you refer to subatomic particles, they are the electron, the proton and the neutron, of which the electron has the lowest mass. Within the particles, their subdivisions, known as quarks, are not even particles, but mass-electric combinations composed of subquantitative rules that can not function independently.
Explanation:
A shark can swim for long periods of time with an average speed of 2.2 m/s. How far would a shark swim at this speed in 42.4 minutes?
Answer:
5596.8 m
Explanation:
42.4 minutes is equal to 2544 seconds.
2544s * 2.2m/s= 5596.8
Physical properties are used to classify and compare substances. Physical
properties can include density, thermal conductivity, electrical conductivity,
solubility, magnetism, melting point, and boiling point. Which statement is
correct about all of these physical properties?
They involve a change in the state of matter.
They involve the production of new substances.
They can be measured only after a change in state.
They are independent of the amount of the sample present.
Answer:
Physical properties involve a change in the state of matter.
Explanation:
A chemical change would change the chemical composition.
A physical change would change the state of matter, for example solid to liquid to gas are changes in state. So, this means when water changes states of matter it is a physical change.
Choose the items that demonstrate potential energy. Train leaving the station, gallon of gasoline, rock sitting at the top of a cliff, sleeping dog, stopped car
Answer:
gallon of gasoline
rock sitting at the top of a cliff
sleeping dog
stopped car
Explanation:
Potential energy is defined as the stored energy that an object has because of its position or shape. It is impossible to observe this energy's effects until this energy is released and transformed into some form of energy. We have two types of potential energy:
Gravitational potential energy: We can define gravitational potential energy as energy stored by a gain in height that an object makes.
Elastic potential energy: Elastic potential energy is defined as the energy stored in elastic objects (springs, rubber bands) when compressed or stretched from their natural position.
From the list of the options given: gallon of gasoline, rock sitting at the top of a cliff, sleeping dog and stopped car are all potential energy.
