ionic and covalent bonds

Why do all bonds form?

• to fill the outermost energy level

• so an atom can be unstable

• so the number of protons and electrons can equal.

• so they can gain neutrons.

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NGSS.HS-PS1-1

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Valence electrons are found

• outermost energy level

• innermost energy level

• some where in the electron cloud

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NGSS.HS-PS1-1

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An atom with 1 valence electron 'needs' a full shell, so it can either gain 7 electrons or lose 1. Which is more likely to occur?

• nothing

• gain 7

• lose 1

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

How do covalent bonds form?

• by sharing electrons between atoms

• by donating or receiving electrons

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NGSS.HS-PS1-2

What two types of atoms make a covalent bond?

• 2 nonmetals

• 2 metals

• 1 metal and 1 nonmetal`

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NGSS.HS-PS1-2

How many valence electrons does Boron have?

• 1

• 2

• 3

• 4

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NGSS.HS-PS1-1

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When an atom loses an electron, it becomes a

• positive ion

• negative ion

Ionic bonds are between

• metals and nonmetals

• 2 metals

• 2 nonmetals

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NGSS.HS-PS1-2

Is this ionic bond drawn correctly?

• Yes
• No

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NGSS.HS-PS1-1

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An atom with 3 valence electrons "wants" a full shell, so it can either gain 5 or lose 3. Which is more likely to occur?

• Gain 5

• Lose 3

• Nothing

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NGSS.HS-PS1-1

NGSS.HS-PS1-2