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A variable is a symbol for a number that we don't yet know. It is usually a letter such as x or y.

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Q: What is a number that can change called?
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What is a number such as the number 8 called because it does not change?

No numbers change unless something happens to them. They are just called "numbers."


What is it called when a specific number whose value does not change?

Such a number is often called a "constant".


What does it mean if a function has a constant rate of change?

if a number can change randomly it is called a variable


What is it called when the number of protons in an atom change?

The only way to change the number of protons in an atom is with a nuclear reaction.


Why atomic number not change during a chemical reaction?

chemical reactions are involved by the participation of electrons only.During chemical reaction number of protans remains as it is. No change in number of protans.Number of protans is also called atomic number.So no change in number of protans means no change in atomic number. That's why atomic number is not change during a chemical reaction.


What is the number of protons and neutrons called?

The number protons in an atom is called the atomic number (it is this number that tells us which element the atom is). The number of neutrons in an atom can change, but the term for the amount of neutrons is called an isotope. The number of protons and neutrons added together is called the atomic mass.


What is it called when you add a number to both sides of a math question?

do you mean math equation? If you add a number to both sides of an equation you do not change it. That is called algebra


What is the change from one number to the next in a geometric sequence called?

The common ratio.


When the repeating chemical and physical properties of elements change periodically with the elements' atomic number it is called what?

It is called periodic law.


What happens when the number of neutrons in an atom change?

The mass number will change. Mass number - Atomic number = Number of neutrons. So, if the number of neutrons change the mass number will change. The atomic number would not change because the atomic number is equal to the number of protons and if the number of protons change, then the element would change.


Why does Calcium have different mass numbers but same atomic number?

Atomic numbers are determined by the number of protons an atom has. The mass number is determined by the number of protons and neutrons. While the number of protons can't change (as the element itself would change), neutrons can and do vary. These are called isotopes.


What is Dividing an object in motion is its velocity by the time necessary to make that change?

(change in speed) divided by (time required to make the change)This number is the magnitude of average acceleration.