Covalent Compounds

Which of the following is the correct Lewis structure for the compound PBr₃?

• structure A

• structure B

• structure C

• structure D

Tags

NGSS.MS-PS1-1

Which of the following is a covalent molecule?

(Use the Periodic Table)

• NaCl

• MgO

• O₂

• K₂S

Which of the following is a covalent molecule? (Use the Periodic Table)

• CCl₄

• MgCl₂

• KF

• K₂S

Tags

NGSS.MS-PS1-1

In chemical compounds, covalent bonds form when

• the electronegativity difference between two atoms is very large.

• electrons are completely transferred between two atoms.

• pairs of electrons are shared between two atoms.

• ions are held together by opposite charges.

Tags

NGSS.HS-PS1-1

Nitrogen has (a)   valence electrons, which means it has ​ (b)   bonding places to make covalent bonds with other nonmetals

• 5

• 3

• 1

• 2

• 4

• 6

• 8

• 7

Tags

NGSS.HS-PS1-1

In a covalent bond, one or more electrons are? 

• shared 

• lost 

• gained 

• transferred 

Tags

NGSS.MS-PS1-1

Elements need ​​ ​ (a)   valence electrons to become stable when they form compounds, except for hydrogen, which only needs ​ (b)  

• 8

• 2

• 1

• 3

• 4

• 5

• 6

• 7

Covalent bonds are between...

• Metal and Nonmetal

• Nonmetal and Nonmetal

How are covalent bonds formed?

• electrons are shared

• electrons are transferred

Tags

NGSS.HS-PS1-1

covalent bond = ________________

• shared electron

• shared electrons

• shared electrons

• shared electrons

Tags

NGSS.HS-PS1-1