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ISOTOPES

Submitted by Anonymous on 10 October 2005 - 3:46am.

I am having a problem with the isotopes.

Here is my problem.
Identify the atoms that are isotopes of each other.

Ar(element), No. Neutrons=18
Mass; No.=35, No. Neutrons=18
Atomic No.=15, Neutrons = 20
Mass No.= 38, No. neutrons= 20
Ar(Element), No. Neutrons = 21
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Part 2

Mass; No.= 15, No. Protons=7
B(Element), MAss No.=10
Atomic No.=6, Mass no.= 12
O(element), No. neutrons=8
Mass; No. = 15, No. neutrons=7

How do you figure it out?

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Submitted by Anonymous on 10 October 2005 - 9:52am.

An element is defines by the number of protons it has, that is all.

So two atoms with the same number of protons are the same element.
If they happen to have a different mass (which will be cdetermined by the sum of the protons and neutrons), then they are isotopes of each other.

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