Ionic and Covalent

Covalent compounds are formed between

• a metal and a nonmetal

• two nonmetals

• two metals

• ions

In covalent compounds, electrons are

• lost

• gained

• shared

• stolen

In the compound N₂O, what does the subscript 2 indicate?

• There are 2 sodium atoms for each atom of oxygen

• There are 2 nitrogen atoms for each atom of oxygen

• There are 2 oxygen atoms for each atom of nitrogen

• Nitrogen atoms are twice a large as oxygen

Valence electrons are found

• in the innermost energy level of an atom

• in the middle energy levels of an atom

• in the outermost energy levels of an atom

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many Aluminum atoms are in Al₂O₃?

• 3

• 5

• 2

• 1

Tags

NGSS.MS-PS1-1

How many valence electrons does carbon have?

• 4

• 5

• 6

• 7

Tags

NGSS.HS-PS1-1

How many valence electrons does Iodine have?

• 4

• 5

• 6

• 7

• 8

Tags

NGSS.HS-PS1-1

How many valence electrons does Chlorine have?

• 4

• 5

• 6

• 7

• 8

Tags

NGSS.HS-PS1-1

How many valence electrons does Sulfur have?

• 4

• 5

• 6

• 7

• 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valence electrons does Calcium have?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.HS-PS1-1