Unit 3 Review Quiz

Match the following

• Transfer of heat through direct contact

• Convection

• Transfer of heat through electromagnetic waves

• Conduction

• Transfer of heat circulating fluids

• Radiation

We learned about three states/phases of matter: solids, ​ (a)   , and gasses. When a solid turns into a liquid, it is called ​ (b)   . When a liquid turns into a gas, it is called ​ (c)   . When a gas turns into a liquid, it is called ​ (d)   . And when a liquid turns into a solid, it is called ​ (e)   .

• liquids
• melting
• evaporation/boiling
• condensation
• freezing

Put the boxes into the proper category

Groups:

(a) Physical Changes

,

(b) Chemical Changes

• Burning

• Freezing

• Melting

• Color Change

• Boiling

• Precipitate

​ (a)   bonds happen between elements of two different groups so that they can have ​ (b)   valence ​ (c)   . Group 1A elements have ​ (d)   valence electron. Group 7A elements have ​ (e)   valence electrons.

• Ionic
• 8
• electrons
• 1
• 7

Use your periodic table to match the following

• Group 2A

• Sodium (Na)

• Group 1A

• Magnesium (Mg)

• Group 7A

• Fluorine (F)

The correct coefficients here are:

_Mg + _Cl₂ --> _MgCl₂

• 1, 1, 2

• 2, 1, 2

• 1, 1, 1

The correct coefficients here are:

_SiO₂ + _HF --> _SiF₄ + _H₂O

• 1, 1, 1, 2

• 1, 4, 1, 2

• 1, 4, 2, 2

Molecules are ALWAYS moving, even in a frozen block of ice.

• True

• False

A new substance or product is always formed during a chemical change.

• True

• False

Place the REACTANTS and PRODUCTS boxes in their proper location on the chemical equation.

a

b

PRODUCTS

REACTANTS