Quy tắc bát tử

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

• 2

• 4

• 6

• 8

• 10

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the best definition of valence electrons?

• The outermost electron NOT involved in chemical reactions

• The innermost electrons involved in chemical reactions

• The outermost electrons involved in chemical reactions.

• The innermost electrons NOT involved in chemical reactions

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What makes an element an atom (neutral) instead of an ion?

• when there are more electrons than protons

• When there are more protons than electrons

• When the electrons are equal to the protons.

How do can atoms complete the octet rule?

• They lose or gain protons

• They lose or gain neutrons

• They lose or gain electrons in the outer most level

• They lose of gain electrons from the inner most level

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons are elements trying to reach in their outer shells?

• 1
• 2
• 5
• 8

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements GAINS 1 electron in order to attain an octet?

• sodium

• calcium

• helium

• boron

• chlorine

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NGSS.HS-PS1-1

What group of elements is stable?

• halogens
• noble gases
• alkali metals
• alkali earth metals

Metals tend to _______________ electrons and form __________ ions. These ions are called ______________.

• gain, negative, anions

• lose, positive, cations

• gain, negative, negatrons

• lose, positive, positrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Anions have a ________ charge.

• positve

• negative

• neutral

Cations have a __________ charge.

• positive

• negative

• neutral