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Electrons Shells Flashcards

(7 cards)

1
Q

What do electrons occupy energy levels called?

A

Shells

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2
Q

What does the lowest energy level or the innermost shell do?

A

Fills with electrons first

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3
Q

How many electrons can the first shell hold?

A

2 electrons

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4
Q

How many electrons can the second shell hold?

A

8 electrons

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5
Q

How many electrons does the third shell hold?

A

Can hold up to 18 electrons but for the first 20 elements it will not have more then 8 electrons

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6
Q

How is the element’s reactivity is determined?

A

It is determined by the number of electrons in which in the outer shell of its atom

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7
Q

How can an atom be perfectly stable

A

To be perfectly stable an atom requires a full outer shell of electrons

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