S1 Chemistry Unit 1: CCS

Davie was conducting an experiment in the chemistry lab. He placed a piece of copper in a jar filled with chlorine gas. What was observed that made him think a chemical reaction occured?

• the copper shrivelled up

• A green solid was in the jar afterwards

• The copper disappeared

• The chlorine gas stayed in the jar

What is one way to speed up the reaction between magnesium and hydrochloric acid?

• Use larger pieces of magnesium

• Increase the concentration of acid

• Decrease the temperature

• Add more water

What is one way to speed up the reaction between magnesium and hydrochloric acid?

• Use larger pieces of magnesium

• decrease the concentration of acid

• increase the temperature

• Add more water

What is one way to speed up the reaction between magnesium and hydrochloric acid?

• Use smaller pieces of magnesium

• decrease the concentration of acid

• decrease the temperature

• use a bigger beaker

What compound is formed when sodium reacts with oxygen?

• Sodium oxide

• Sodium chloride

• Sodium sulfate

• Sodium nitrate

What compound is formed when calcium reacts with sulfur?

• calcium oxide

• sulfur calmac

• calcium sulfipe

• calcium sulfide

Name an element in the same group as oxygen in the Periodic Table.

• Nitrogen

• Sulfur

• Helium

• Carbon

Give the symbol for a metal element.

• Li

• C

• F

• P

Sodium chloride is a ​ (a)   as it is made of 2 elements (type of atom) joined. Oxygen is a ​ (b)   as it has only 1 type of atom. Salty water is a ​ (c)   as the salt and water are mixed together but not joined.

• compound
• element
• mixture

Organize these options into the right categories

Groups:

(a) Alkali Metal

,

(b) Halogen

,

(c) Noble Gas

• Bromine

• Reactive non-metal

• Lithium

• Helium

• Group 1

• Argon

• Very Reactive metal

• Group 7

• Unreactive

• Group 8 or 0

• Chlorine

• Potassium