Chapter 6 Definitions

Question 1

GCE

Answer 1

An equation that uses letters of the alphabet in place of the symbols for elements

Question 2

Synthesis reaction

Answer 2

Involves the combination of smaller atoms and molecules into larger molecules

Question 3

Hydrocarbons

Answer 3

Molecules that are composed of the elements hydrogen and carbon

Question 4

Fossil fuels

Answer 4

Hydrocarbons formed underground over millions of years from the remains of once living organisms

Question 5

Single displacement

Answer 5

Chemical change in which an element reacts with an ionic compound

Question 6

Double displacement

Answer 6

A reaction where the positive or negative ions in 2 dissolved ionic compounds switch places and sometimes results in a precipitate being formed

Question 7

Combustion

Answer 7

A vary rapid chemical reaction of a substance with oxygen to produce compounds call oxides aka burning
Give off large quantities of heat and light

Question 8

Decomposition

Answer 8

Involve the splitting of a larger molecule into elements or smaller molecules