Answer:
sugar and oxygen and nutrients
Explanation:
Blood brings oxygen and nutrients to all the parts of the body so they can keep working. Blood carries carbon dioxide and other waste materials to the lungs, kidneys, and digestive system to be removed from the body.
The Periodic Table is a chart of elements arranged in rows and columns according to their what
physical properties.
chemical properties.
name.
place of origin.
how do convection currents form ?
Answer:
Convection currents occur when a fluid is near a heat source.
Explanation:
Heat sources provide energy to their surroundings. When fluid receives this energy, molecules inside it move around more, spacing out from each other and lowering the density.
We know from helium balloons that things with lower densities than their surroundings are pushed upwards. Therefore, the fluid close to the heat source moves upwards, as it is hotter than the rest.
As this fluid moves up, cooler molecules drift down, succumbing to gravity.
As hot molecules move up and further from the heat source, they cool down, and drop. As colder molecules drop and move towards the heat source, they heat up, and begin rising.
This results in a circular motion called a convection current. It is present in the strong winds at the seaside and in the magma in the Earth's mantle.
Why is imaging the first black hole such an amazing scientific achievement? Explain.
Answer:
The photographic evidence of a long-unseen cosmic force is an extraordinary achievement in science. ... Exciting as it is, the photo actually doesn't capture the black hole itself, nor its interior. Astronomers aimed their telescopes at the event horizon, the invisible boundary thought to surround all black holes
Explanation:
Hope this helps :)
How many atoms are in 0.250 moles of Rb?
Answer:
1.51*10^23 atoms Rb
Explanation:
Use dimensional analysis
How many electrons does chlorine need to obtain a full outer energy level of electrons? A) 1 B) 2 C) 3 D) 4
You just need one to reach full energy. (A)
Only one electrons does chlorine need to obtain a full outer energy level of electrons. Thus, option A is correct.
What is an electron?An electron is defined as a subatomic particle which is charged negatively either bounded to an atom or not it means free. The nucleus of an atom is made up of electron, proton and neutron. The electron is a basic particle and electron is not made of anything.
The nature of electron is free it means they are present freely in nature and consist of an atom.The main function of electron is that they play the role of negatively- charged component of an atom.
The electrons are primary source of current conducting and electrons number as well as atomic number of an element is always same or equal. There is no size of electron but the mass of electron is 9×10^-31.
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George has several plants in his garden once in a while he adds fertilizer to the soil then leaves absorb the nutrients in the fertilizer and you look healthy if a cell is compared to a plant which organelle helps transport fertilizer from the soil to leaf?
A. lysosome
B. mitochondrion
C. vacuole
D. vesicle
How would you record the length of an object?
Answer:
a ruler
Explanation:
What is the difference between mass number and atomic number?
Answer:
They are found the same way but use different symbols when found.
Explanation:
On the periodic table, why are all noble gases placed in column 18 (8A)?
A.Noble gas elements have identical molar masses.
B.Noble gases are all rarer than elements in other columns.
C.The noble gases only chemically react with other noble gases.
D.The valence electron configuration is similar in all noble gas elements.
Answer:
D
Explanation:
In the periodic table the noble gases are place in same column because the valence electron configuration is similar in all noble gas elements. Thus option D is correct.
What is periodic table?A periodic table is defined as an organization of all known elements in increasing atomic number and repeating chemical properties.
It can also be defined as a tabular arrangement of chemical elements ordered by increasing atomic number and element groups.
There are more than 118 elements are arranged in modern periodic table.
Noble gases are defined as any of a class of rare gases that includes helium, neon, argon, krypton, xenon, and, most commonly, radon and display high stability and extremely low reaction rates.
Electronic configuration are defined as the electron configuration around the nucleus of a specific atom or molecule.
Thus, in the periodic table the noble gases are place in same column because the valence electron configuration is similar in all noble gas elements. Thus option D is correct.
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The mass spectrum of the element Sb is most likely represented by which of the following?
A. 122 Atomic Mass
B. 121 and 123 Atomic Mass
C. 120, 123 and 124 Atomic Mass
D. 120,121 and 124 Atomic Mass
The correct answer is B: 121 and 123 Atomic Mass.
Mass spectrometers only detect stable isotopes.
Almost all elements exhibit isotopy. Isotopy is a phenomenon whereby atoms of the same atomic number have different atomic masses. The relative atomic mass of each element is the weighted average of the masses of all its isotopes.
Owing to the phenomenon of isotopy, the relative atomic mass of elements are not whole numbers.
The isotopes recorded by a mass spectrometer are stable isotopes of an element. The two stable isotopes of antimony are Sb-121 and Sb-123. These two appear in its mass spectrum.
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how is plastic made?
Answer:
Cellulose, Coal, Natural Gas, Salt, and Crude Oil
Please pray for healing and my name is Fairouz
Answer:
I hope everything gets better
Explanation:
Answer:
I hope you are better now
Now what we've found the volume, let's take a look at the mass. We didn't tare, or zero, the scale before pouring in the fluid. If the value on the scale immediately before pouring in the fluid read 80.1g, what is the mass of the fluid?
A. 86.5 g
B. 246.7 g
C. 116.5 g
Answer:
a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Oxygen gas is produced when hydrogen peroxide reacts with manganese
dioxide. How would you identify the oxygen gas? Name the method/test you
would use and explain the details of your observations to confirm the identity of
the gas.
Answer:
method used is decomposition
Explanation:
Hydrogen Peroxide (H2O2) will decompose rapidly in the presence of Manganese Dioxide, acting as the catalyst, to produce Oxygen gas and water.
When the Hydrogen Peroxide and Manganese Dioxide are mixed, Oxygen gas bubbles should be seen coming from the mixture. One can collect this Oxygen gas produced over water (through water-displacement) and store it inside a bottle for later use.
electronegativity of argon element
Answer:
argon is 18 2-8-8 since it has octet circle and fully stable you can say it has no electro negativity
what would happen to the atom calcium if you added 3 protons?
Answer:
Vanadium
Explanation:
Atomic number increases, thereby changing into an atom of Vanadium
Answer:
Vanadium
Explanation:
Science rocks
1.As with any grid, the periodic table has ________ (left to right) and __________ (up and down).
2.Every row is called a ___________.
3.All the elements in the same period have the same number of _______.
Each column is called a __________.
4.The elements in each group have the _________ number of electrons in the outer orbital (or valence electrons).
5.Noble gases and helium are considered “happy” because their ______________ shell is ___________.
this was not a multiple-choice its about the periodic table
Answer:
rows and columnsperiodatomic orbitalsvalence electrons4.similar properties
5.electrons are very reactive
the outermostConvert each of the following lengths to the units requested.
a. 17.3 m to centimeters
b. 2.56 m to kilometers
567 dm to meters
5.13 m to millimeters
Answer:
1730 cm
0.00256 km
5130 mm
please help me out with this I WILL GIVE BRAINLIEST!!
You have to pick a element corresponding to what the sentence says, like for example it give you three element options and it would say, pick the smallest atom and that element would be the awnser!
Answer:
BE
Explanation:
I NEED HELP QUICK Activity:
Part 1: Write all bold vocabulary and define the words (See attached PDF File below). Make sure to number each.
Part 2: Look at the "Second Read of Investigating Landforms On Venus" worksheet (Slide 14) and highlight text to the questions on the worksheet.
Part 3: Answer the questions on the "Second Read of Investigating Landforms On Venus" worksheet: 1) How were the novae on Venus similar to the landforms in Geyra's computer model? AND 2) How did the results of Gerya's model provide evidence for what formed the novae on Venus? (Slide 16)
Part 4: Write the notes: (Slide 19)
3) Scientists can use models to test their ideas and get evidence about processes in the natural world that are difficult to observe.
Exit Slip: How do models help scientists answer questions?
PLEASE HELP ME I WILL MARK AS BRAINLIST.
When we have stomach disorder, we take antacid to solve the problem. How does it help? Support your answer with an equation.
Answer:
idk
Explanation:
Use the information below to explain why the atomic radius decreases down a group.
Answer:
Detail is given below
Explanation:
Atomic radii trend along group:
As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.
As the size of atom increases the ionization energy from top to bottom also decreases because it becomes easier to remove the electron because of less nuclear attraction and as more electrons are added the outer electrons becomes more shielded and away from nucleus.
In A we can see that there is one positive charge and force of attraction is 2.30×10⁻⁸ N and distance is 0.10 nm
In B we can see that negative charge is further away from nucleus because of greater distance thus force of attraction will be less. 0.58×10⁻⁸ N
In C this distance further increases and force also goes in decreasing 0.26×10⁻⁸ N.
Diana and Kinsey are put in charge of choosing a mascot for their basketball team. There are fifteen players on the team, but Diana and Kinsey survey only the five players on the starting lineup about their favorite mascot.
Which best describes this error in data collection?
The data are inadequate.
The data are false.
The data were recorded incorrectly.
The data cannot be reproduced.
Answer: the data are inadequate .
Explanation:
Fill in the blank with either "up" or "down"
a. If the pressure of a gas increases, the temperature will go up
b. If the volume of a gas increases, the pressure will go up
c. If the volume of a gas increases, the temperature will go up
d. If you increase the amount of gas, the pressure will go down
Answer:
a. up
b. down
c. up
d. up
Explanation:
How many significant figures are in 0.00030
2 Which thing has the most mass?
O marble
elephant
O fork
Obaseball
Explanation:
marble is the correct answer
Answer:
Elephant
Explanation:
An elaphant is the option with the most mass.
Hope this helps! Please makr brainliest! Stay safe, God bless and happy studying!
3. What is SI system? Why has SI system been developed? Give reasons
Which statement best describes how an existing theory is often affected by the development of new technology?
A.) An existing theory is thrown out and replaced with a completely new theory based on the new observations.
B.)An existing theory is modified so that it can explain both the old and new observations.
C.)An existing theory remains the same because a theory is a proven fact that is always true.
D.)An existing theory is kept unchanged while a new theory is developed to explain the new observations.
Answer:
An existing theory is modified so that it can explain both the old and new observations.
Explanation:
The statement which best describes how an existing theory is often affected by the development of new technology is that an existing theory is modified so that it can explain both the old and new observations.
What is a theory?
Theory is defined as a thoughtful explanation which is provided for observations which is constructed using scientific methods.The theory brings together many facts and hypothesis.
It is called as theory as it provides some set of assumptions initially which provide description to the field's approach to the subject.These are elementary theorems of a particular theory.It is a rational type of thinking about a set of observations.
They may be scientific,or non scientific or have no discipline at all.There are three types of theory:1) scientific, 2)philosophical and 3) moral.It provides explanation regarding the underlying mechanisms .
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please help me quickly
Answer: 2
Explanation:
Answer:
It is two
Explanation:
You need to determine the
volume piece of chalk using water
displacement. The graduated cylinder
filled with water measures 8.7 mL
before the chalk is added. After the
chalk is added the water level rises
and now reads 12.4 mL. Determine the
volume of the piece of chalk in mL.
Answer:
3.7 mL
Explanation:
Step 1: Given data
Volume of water before the chalk is added: 8.7 mL
Volume of water after the chalk is added: 12.4 mL
Volume of the chalk: ?
Step 2: Calculate the volume of the chalk
The volume of the chalk is equal to the volume of water after the chalk is added minus the volume of water before the chalk is added.
V = 12.4 mL - 8.7 mL = 3.7 mL
