Uncategorized

Wnat determines the identity of an element?

**We need you to answer this question!**

###### If you know the answer to this question, please register to join our limited beta program and start the conversation right now!

## Related Questions

###### Asked in Chemistry, Elements and Compounds, Atoms and Atomic Structure

### What determines which element an atom is?

The number of protons in an atomic nucleus determines which
element an atom is. For example: If the number of protons in an
atom is 6, it is carbon. If the number is 11, it's sodium. And
let's be clear about this: the sole determinant of elemental
identity is the number of protons in the nucleus. Period.

###### Asked in Math and Arithmetic

### What is the identity element for addition and subtraction?

0, zero, is defined as the identity element for addition and
subtraction.
* * * * *
While 0 is certainly the identity element with respect to
addition, there is no identity element for subtraction. The
identity element of a set, for a given operation, must commute with
every element of the set.
Since a - 0 ≠ 0 - a, according to group theory, 0 is not an
identity with respect to subtraction.