Ionic and Covalent compounds

Which two elements would NOT form an ionic bond?

• calcium and lithium

• calcium and oxygen

• lithium and oxygen

• calcium and carbon

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A sodium ion has a charge of

• -1

• -2

• +1

• +2

Tags

NGSS.HS-PS1-1

Energy is released when

• valence electrons are removed from an atom

• valence electrons are gained by an atom

• a positive ion forms

• A and B

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

True or False: Sodium and Chloride ions have equal but opposite charges

• True

• False

Tags

NGSS.HS-PS2-4

True or False: An ionic bond forms when atoms of a non-metal give up electrons to atoms of a metal

• True

• False

Tags

NGSS.HS-PS1-2

Fill in the blank: A charged particle that forms when an atom gains or loses electrons is called a(n)

What is the correct molecular formula of Calcium Chloride?

• CaCl

• Ca₂Cl

• CaCl₂

• Ca₃Cl₂

Tags

NGSS.MS-PS1-1

An example of a covalent compound is

• sodium floride

• calcium chloride

• carbon dioxide

• all of the above

Tags

NGSS.MS-PS1-1

In all covalent bonds, valence electrons are

• lost

• gained

• shared equally

• shared

Tags

NGSS.HS-PS1-2

A compound that contains one nitrogen atom and two oxygen atoms is named

• oxygen nitride

• dioxygen nitride

• nitrogen dioxide

• nitrogen monoxide