Answers
Answer:
The atomic number tells us how many protons and electrons are in the element we are looking at.
Related Questions
Calculate the volume that 140 g of H2 gas will occupy at 305 K and 8.2 atm.
Answers
Answejust put my mum said i didnt have to do this question
Explanation:
becuase im cool like that
PLEASE HURRY WILL GIVE BRAINLIEST TO FASTEST, MOST HONEST
of what importance is the gas ozone in the stratosphere? how would a decrease of ozone in the stratosphere affect the radiation received at earth's surface?
Answers
Answer :D
It acts as a shield to protect Earth's surface from the Sun's harmful ultraviolet radiation.
There you go :D
Without the weakening of the shield, we would get skin cancer, cataracts, and impaired immune systems.
___
Could you try to answer one of my questions pls? :D
A sixth grade teacher takes students on a field trip to the beach. One student finds several pebbles that have a rounded shape and are smooth to the touch. What process most likely shaped these pebbles?
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Answer:
the one you have selected is correct
Explanation:
Answer:
The shape of the pebbles is a result of weathering and deposition.
Explanation:
Each of the models shown represents a magnesium atom. Which models show the same isotope of magnesium? P, Q, and R
P and Q
P and R
Q and R
Answers
Answer:
P and Q
Q and R
Explanation:
To begin, we must bear in mind the meaning of isotope.
Isotopes are atoms having the same atomic number (i.e proton) but different mass number due to the difference in the neutron number present in the atoms involved.
Thus, we shall write out the number of protons, neutrons and electrons present in the model given above. This is given:
Model P:
Proton = 12
Neutron = 13
Electron = 13
Model Q:
Proton = 12
Neutron = 12
Electron = 13
Model R:
Proton = 12
Neutron = 13
Electron = 12
From the above data, we can say that:
1. P and Q are isotope since they have different Neutron number.
2. P and R are not isotope since they have the same Neutron number.
3. Q and R are isotope since they have different Neutron number.
Which compounds have carbon-carbon double bonds?
Answers
Answer:
Aikens/hydrocarbons
Explanation:
because the formula of this is Cn H²n
HELP PLEASE lol, I just need a couple answers but I can't find this one anywhere, pic of question down below. :)
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Answer:
It's b
Explanation:
amino acid is to protien as?
1) fat is to lipid
2) dna is to rna
3)sugar is to fat
4) simple sugar is to starch
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N
Nitrogen
14.0
Which two parts are needed to make a neutral atom of nitrogen?
A. Electron clouds with a total of seven electrons
B. A nucleus with three protons and four neutrons
O C. A nucleus with seven protons and seven neutrons
D. Electron clouds with a total of 14 electrons
Answers
Answer:
electron - proton
Explanation:
fsger
Answer:
A. Electron clouds with a total of seven electrons
Explanation:
A neutral atom of nitrogen must have a total number of 7 electrons in its cloud.
This is the required number of electrons to bring nitrogen into its state of neutrality.
To maintain neutrality the number of protons and electrons in an atom must be equal. A charge atom called an ion have either the proton or electron greater. Neutrality is attained when the number of protons and electrons are the same.to chemicals mixed together to make heat physiacal or chemical change THATS IS ALL IMMA SAY ( DONT ANSWER IF THERES NO EXPLATION )THXSSS HAVE A GOOD DAY
Answers
Answer:its a chemixal change because there are stuff getting mixed togehter making it a chemiacl change
Explanation:
What is the element with 2 protons on the
periodic table?
Hydrogen was the first element with 1 proton
So the second one with 2 protons must be
Answers
Answer:
Helium
Explanation:
A candle weighs 25 grams before burning. After burning for 10 minutes, the candle now weighs 17 grams. Using the Law of Conservation, explain how this is possible.
Answers
Explanation:
These are some unaccounted mass that was involved.
According to the law of conservation "matter is neither created nor destroyed but can be combined with one another".
The rule applies to all substances with no exception When burning a candle, a phase change process is going on. Some candle part of the candle occur in molten form whereas the other part is a solid. In this experiment, the molten wax was not taken into consideration. This accounted for the mass deficit.Which statement is true concerning the elements in families 1 and 2?
A. All the elements in families 1 and 2 have three electrons in their outer shell.
B. All the elements in families 1 and 2 need the s and p sub-levels to place their outer
shell electrons.
C.All the elements in families 1 and 2 need only 2 energy levels to place their
electrons.
D. All the elements in families 1 and 2 can place all their outer shell electrons in the s
sub-level.
Answers
Answer:
The correct option is;
D. All the elements in families 1 and 2 can place all their shell electrons in the s sub-level
Explanation:
The elements in families 1 and 2 also called the group 1A and group 2A elements are known as the alkali and alkaline earth metals. The elements in the families 1 and 2 are also referred to as the s-block elements as they have their valence electrons which are 1 and 2 respectively, in the s-orbital or s sub-level
Due to their low ionization energy, and the ease with which they donate their valence electrons, elements of the families 1 and 2 are known to be very reactive, and are found in a combined state in nature.
8. Were there any problems with the experiment or the methods? Did you have any surprising results
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insertion mutation definition ?
Answers
Answer:
Insertion is a type of mutation involving the addition of genetic material. An insertion mutation can be small, involving a single extra DNA base pair, or large, involving a piece of a chromosome.
Explanation:
insertion is some sort of mutation that records the addition of genetic material
The periodic table is organized into vertical groups of
A
elements with similar properties.
B
comporlds with different properties.
с C
elements with all the same chemical properties.
compounds with all different physical properties.
Answers
PLEASE HELP WITH THESE THREE (30 POINTS)
1) How is the number of neutrons in the nucleus of an atom calculated?
A. Add the number of elections- and protons+ together
B. Subtract the number of elections- from protons+
C. Subtract the number of protons+ from the atomic mass number
D. Add the atomic mass number to the number of elections-
2) Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr) are in the same group on the periodic table. Why? *
A. They have the same size.
B. They react with each other.
C. They have similar properties.
D. They have the same number of protons
3) Which of the following elements would be a transition metal?
A. Ca
B. Au
C. Rb
D. Fr
Answers
2. C
3. A
i had the test with the same exact questions
I need help with this!
Answers
Answer:
wavelength decreases, the frequency increases
Explanation:
In the electromagnetic spectrum, as the wavelength decreases, the frequency increases.
The wavelength of the wave is the distance between successive troughs and crests along the wave train.
Frequency of the wave of the number of waves that passes through a point per unit of time.
On an electromagnetic wave, as the wavelength decreases the frequency increases. Also, as the wavelength increases the frequency decreases.There are ??? molecules in one mole regardless of what the substance is.
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Answer: The mole allows people to calculate the number of middle schoolers entities (usually atoms or molecules. Isabella's number is an absolute number: there are 6.022 × 1023 middle schoolers entities is in 1 mole. This can also be written as 6.022 × 1023 mol-1.
Explanation: I hope that helped !!
According to the big bang theory, which statement is accurate about how the universe came to be?
It expanded slowly.
It gradually warmed.
Stars and galaxies formed.
Atoms such as hydrogen were destroyed
Answers
Answer:
The term Big Bang defines that the Universe has expanded from the ancient hot and thick primary situation at some fixed time in the past.
Big Bang theory refers to the origin of the Universe. In the beginning, universe is very heavy and small hot ball of matter. It was a point no bigger than the head of a pin when all the things squished with each other and universe is expanded with huge explosion of energy. Due to expansion, it is cooled and results in the formation of Stars and galaxies. After sometime, atoms formed like helium and hydrogen.
Thus, statement (1), (3) and (4) is correct whereas statement (2) and (5) is incorrect. the right answer is - (It expanded slowly), (Stars and galaxies formed,) (Atoms such as hydrogen and helium formed.)
Explanation:
The statement 'stars and galaxies formed' is accurate about how the universe came to be according to the big bang theory.
What is the big bang theory?The big bang theory is a widely accepted theory in physics that intends to understand the origin of the universe.
According to this theory, the universe started with a hot and dense single point that progressively inflated and stretched.
The big bang theory has two major principles:
The universe is continuing to expand nowadays.An explosion caused matter and energy to expand in order to form all the universe.The big bang theory postulates that this phenomenon occurred approximately 13 billion years ago.
In conclusion, the statement 'stars and galaxies formed' is accurate about how the universe came to be according to the big bang theory.
Learn more about the big bang theory here:
https://brainly.com/question/10865002
Is oxygen radioactive yes or no?
Answers
Answer:
ima go with no.....
Explanation:
Answer:
Stable isotopes are variants of atoms that differ in mass but do not decay over time, that is, they are not radioactive. The element oxygen (O) is found in three naturally occurring stable isotopes. So oxygen is not radioactive.
Explanation:
Based on this chemical equation KNO3 --> KNO2 + O2
Please identify the kind of chemical reaction represented
A Synthesis
B Decomposition
Single Replacement
D Double Replacement
E) Combustion
HURRY PLEASE THIS NEEDS TO BE TURNED IN BY 4:00pm
Answers
Help I WILL AWARD BRAINLIEST
Answers
Answer:
see the pic for the answer
Which of the following correctly shows the flow of energy in a food chain?
hawk ⇒ snake ⇒ mouse ⇒ grass
grass ⇒ hawk ⇒ snake ⇒ mouse
mouse ⇒ snake ⇒ hawk ⇒ grass
grass ⇒ mouse ⇒ snake ⇒ hawk
Answers
Answer:
hawk .snake. mouse and grass
Please help me with this!
Answers
Answer:
D
Explanation:
Glucose is made of 6 Carbon atoms, 12 Hydrogen atoms, and 6 Oxygen atoms.
The equation is: C6H12O6
Answer: D
Explanation: D because it has more molecules elements then the glucose.
How many grams are equal to 3.46 moles of iodine
?
Answers
875.38 g are equal to 3.46 moles of iodine.
What is moles?The mole is the SI basic unit of substance quantity, with the sign mol. The amount of substance in an object or sample is defined as the number of elementary entities of that substance.
It is given that n = 3.46, molar mass of iodine = 253 g/mol.
Moles can be expressed as:
Moles = mass /molar mass
3.46 mol= mass / 253 g/mol.
mass = 253 g/mol ×3.46 mol
mass = 875.38 g.
To know more about moles click here.
https://brainly.com/question/20486415.
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A small molecule with an overall charge is called a(n)
Answers
Answer:
Monotomic atom
Explanation:
How do atoms make molecules?
Answers
Explanation:
Atoms can join together - they form bonds together - to make MOLECULES. ... For example, a hydrogen atom forms one bond, an oxygen atom forms two, and carbon forms four bonds. Look at that molecule of water again - each hydrogen has one bond, and the oxygen in the middle has two bonds. Molecules can be much bigger.
What relationship, if any, do you see between a star’s color and its temperature?
Answers
Answer: their is relationship
Explanation: The amount of light produced at each wavelength depends on the temperature of the object producing the light. Stars hotter than the Sun (over 6,000 degrees C) put out most of their light in the blue and ultraviolet regions of the spectrum.
There are ______ moles in 3.73 x 1023 formula units of barium chloride.
Answers
Answer:
0.62 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L}\\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{3.73 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{3.73}{6.02} \\ = 0.619601...[/tex]
We have the final answer as
0.62 molesHope this helps you
Need help ASAP... The diagram shows a box in the periodic table.. what is the atomic number of the element??
