Properties of ionic and covalent compounds

Compounds composed of a ______________ and _____________ like the compound CaCl₂ , are ionic compounds.

• metal ... metal

• nonmetal ... nonmetal

• metal ... nonmetal

Tags

NGSS.HS-PS1-2

What property is describing an ionic compound?

• shares electrons

• high melting point

• covalent bonds

• made up of nonmetals.

Which of the following is NOT TRUE about covalent compounds?

• They have low melting and boiling points.

• They are formed from 2 nonmetals.

• They can conduct electricity when dissolved in water (aqueous).

The following properties are all characteristics of ionic compounds EXCEPT

• high melting and boiling points

• low melting and boiling points

• make of ions

• conduct electricity when dissolved in water

Tags

NGSS.HS-PS1-3

In what form can an ionic compound conduct electricity?

• when dissolved in water
• as a solid
• as a crystal
• when warmed slightly

Which of the following describes covalent bonds?

• Bonds form because of opposite charges

• electrons are shared to fill outer electron shells

• Electrons are transferred between atoms

• Covalent bonds are magical

Tags

NGSS.HS-PS1-2

Properties of covalent compounds include:

• brittle, conducts electricity (aqueous state), high melting points

• usually gas or liquid, relatively low melting points, do not conduct electricity

• shiny, malleable, ductile, conducts electricity, usually a solid

Tags

NGSS.HS-PS1-1

Give a reason why oxygen diflouride is a gas at room temperature

• oxygen diflouride has a low boiling point

• oxygen diflouride has a high melting point

• oxygen diflouride does not conduct electricity

Tags

NGSS.HS-PS1-3

When can molecular (covalent) substances conduct electricity?

• Never

• As a solid

• As a liquid

• As a solution

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

Tags

NGSS.MS-PS1-1