Ionic and Covalent Compounds Exam

How many electrons do the following atoms need to fill the shells?

• 2

• Cl

• 1

• P

• 3

• S

Tags

NGSS.MS-PS1-1

Choose all of the valence electron(s).

Match the following to form true statements:

• cannot conduct electricity

• Elements in group 1 of the periodic table form ions

• high melting and high boiling points

• There are many strong bonds

• with a charge of 1+

• Ionic compounds have

• between ions in an ionic compound.

• When solid, ionic compounds

• can conduct electricity

• When melted ionic compounds

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

When a nonmetal gains electrons, it becomes a(n) (a)  

• Anion
• Cation

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When a metal loses electrons, it becomes a(n). (a)  

• anion
• cation

Name this compound: Na₂O

(a)  

Tags

NGSS.MS-PS1-1

Name this compound: CaF₂

(a)  

Tags

NGSS.MS-PS1-1

Unknown element W has 2 valence electrons. Unknown element X has 7 valence electrons. Which formula shows the most likely outcome when elements W and X react?

• WX

• WX₂

• W_2X

• W₂X₂

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

How do the following two elements bond together?
K¹⁺  S^2- 

• KS
• K₈S
• K₆S₃
• K₂S

Tags

NGSS.MS-PS1-1

What is the correct formula for barium chloride

• BaCl₃

• BaCl

• Ba₂Cl

• BaCl₂

Answer explanation

The charge of Ba+2 becomes the subscript of chlorine and the charge Cl-1 of becomes the subscript of barium