Chemistry 2

Question 1

Define Lustre

Answer 1

How shiny the substance is after sanding it with glass paper or steel wool

Question 2

Define Ductility

Answer 2

Whether or not a substance can be drawn into a wire

Question 3

Define Malleability

Answer 3

Whether or not a substance has the ability to be hammered or bent into shape

Question 4

Define Chemical Change

Answer 4

When the substance/s changes into a new substance.

Question 5

Define Physical Change

Answer 5

When the appearance of the substance changes but the chemical composition doesn’t

Question 6

Define Reactivity

Answer 6

Whether a substance will react or not.

Question 7

Define Corrodibility

Answer 7

Whether or not a substance breaks down due to a chemical reaction with water or oxygen.

Question 8

Define Flammability

Answer 8

Whether a substance has the ability to be burned or not.

Question 9

Define Toxicity

Answer 9

Whether a substance is poisonous or not.

Question 10

Define Light Sensitivity

Answer 10

Whether a substance reacts in light or not.

Question 11

Define Exothermic

Answer 11

Describes chemical reactions that give out heat energy to the surroundings

Question 12

Define Endothermic

Answer 12

Describes chemical reactions that absorb heat energy from the surroundings

Question 13

Define Chemical Energy

Answer 13

Energy stored in chemical bonds that is released during chemical reactions

Question 14

Define chemical process

Answer 14

a reaction that changes the arrangement of the atoms or molecules of the substances involved

Question 15

Define Synthesis Reaction

Answer 15

Occurs when two chemicals combine to form one larger chemical.

Question 16

Define Decomposition Reaction

Answer 16

Occurs when one chemical breaks up to form two or more smaller chemicals.

Question 17

Define Combustion Reaction

Answer 17

A chemical reaction in that a substance reacts with oxygen and heat is released

Question 18

Define Single Displacement Reaction

Answer 18

Occurs when the atoms of a pure element replace those of an element in a chemical compound.

Question 19

Define Precipitation/Double Replacement Reaction

Answer 19

The cations of two ionic compounds switch places, usually forming a precipitate.

Question 20

Define Acid-base Reactions

Answer 20

When we add a base and acid together they react, neutralising each other and forming salt and water.