Grade 8 Quiz 1 Checkpoint chemistry

When an acid reacts with a base, a neutralisation reaction occurs, producing a salt. Using the following equation, name the salts that are produced in the acid-base reactions.

a) sulphuric acid + lithium hydroxide →………………………

When an acid reacts with a base, a neutralisation reaction occurs, producing a salt. Using the following equation, name the salts that are produced in the acid-base reactions.

b) nitric acid + sodium hydroxide → ……………………… 

Complete the following equations to illustrate them.

a) Acid + metal → salt + ………………………

(a)  

Complete the following equations to illustrate them.

b) Acid + ……………………… → salt + water

(a)  

Complete the following equations to illustrate them.

 c) Acid + metal carbonate → salt + ……………………… + water

(a)  

The table below shows how the four metals react with oxygen when heated in air.

 (i)      Put them in order from the most reactive metal to the least reactive metal.

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Which particles make up the nucleus of an atom? ( choose more than one answers)

• proton and neutron

• only electron

• only proton

• proton, neutron and electron

The horizontal row on the periodic table is called a

• Group

• Family

• Period

• Atomic number

A vertical column on the periodic table is called a

• Group

• Family

• Period

• Atomic number

Which atom has atomic number of 4?