ELEMENTS, ISOTOPES AND ATOMIC STRUCTURES

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Last updated 7:11 AM on 6/15/26
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6 Terms

1
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What subatomic particle defines which element an atom is?

The proton.

2
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What is an isotope?

An atom of the same element with the same number of protons but a different number of neutrons.

3
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True or False: Isotopes react differently in chemical reactions.

False. They react the same way; they just have different masses.

4
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What does 'abundance' mean in chemistry?

How common or rare a specific isotope is in nature.

5
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What is the formula for calculating Relative Atomic Mass (Ar)?

(Sum of [abundance × mass]) ÷ Total abundance (usually 100).

6
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If an atom has an atomic number of 3, what element is it?

Lithium