ionic and covalent compounds

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

How do you determine the number of valence electrons an element has?

• Look at its period
• Look at its group
• Look at its atomic number
• Look at its atomic mass

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons does lithium have?

• 1

• 3

• 6.9

• 7

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NGSS.HS-PS1-1

When two atoms share electrons, a chemical bond is formed. This type of bond is called:

• covalent bond

• ionic bond

• crystal bond

• polyatomic bond

What type of elements will form an ionic bond?

• Metals + Metals
• Nonmetals + Nonmetals
• Metals + Nonmetals
• None of the above

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How are covalent bonds formed?

• Sharing of electrons
• Transfer of electrons

How are ionic bonds formed?

• Transfer of electrons
• Sharing of electrons

In order for sulfur to reach an octet, sulfur will...

• Gain 2 electrons

• Lose 2 electrons

• Gain 1 electron

• Lose 1 electron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What usually forms the positive ion?

• Metal

• Non Metals

• None

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What usually forms the negative ion?

• nonmetals

• metal

• none

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2