Chapter 11 Chemical Changes

Question 1

what is an ion

Answer 1

it is a charged particle . atoms gain or lose electrons to form ions so they can have stable noble gas electronic configuration

Question 2

what is an ionic bond

Answer 2

an ionic bond is formed when positive metal ions are attracted to negative non-metal ions to form an ionic compound

Question 3

metal + acid =

Answer 3

hydrogen gas + salt

Question 4

acid + alkali =

Answer 4

salt + water

Question 5

acid + metal carbonate =

Answer 5

salt + carbon dioxide gas + water

Question 6

chemical formula of sulfuric acid

Answer 6

H2SO4

Question 6

chemical formula of nitric acid

Answer 6

HNO3

Question 7

example of alkali

Answer 7

metal hydroxide

Question 8

what is combustion

Answer 8

it is the combination of a substance with oxygen when the substance is heated

Question 9

what is oxidation

Answer 9

it is a chemical reaction in which when oxygen combines with another substance combines with oxygen to form a new substance

Question 9

what is decomposition

Answer 9

it is when a substance is broken down to two or more simpler substances