1.5.1

Question 1

chemical symbol

Answer 1

is a one- or two-letter abbreviation used to designate an element.

Question 2

chemical formula

Answer 2

is a combination of chemical symbols and numbers used to represent a compound or to indicate the atoms present in a molecule.

Question 3

sub­script

Answer 3

is a number after and set below the symbol telling how many atoms of an element are in each molecule.

Question 4

chemical equations

Answer 4

explain what happens during a chemical change - when chemical bonds are formed or broken.

Question 5

Binary compounds

Answer 5

are chemical compounds made of only two elements.

Question 6

C6H12O6

Answer 6

6 carbon 12 hydrogen 6 oxygen
chemical compound :)

Question 7

NaOH

Answer 7

Sodium hydroxide

Question 8

CH4

Answer 8

Methane

Question 9

Ca(OH)2

Answer 9

Calcium hydroxide