Atoms Test-SCI

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7 Terms

1
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What is an element?

A pure substance that cannot be broken down into substances by chemical means

2
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what are isotopes?

atoms of the same element with different number of neutrons

3
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whats a compound?

when 2 or more elements are chemically combined

4
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What's a valence electron?

The electrons on the outermost ring

5
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What’s In the Nucleus of an atom?

protons and neutron

6
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What determines the identity of an atom?

The atomic number and how many protons it has

7
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What’s the octet rule?

atoms gain, lose, or share electrons to achieve a stable form with 8 valence electrons