Year 10 Chemistry Review

How many electrons are there in

• 11

• 23

• 12

• 1

How many valence electrons are there in

• 1

• 2

• 11

• 23

What are the sub-atomic particles in an atom with a mass number of 24and an atomic number of 12?

• 12 protons, 12 neutrons and 24 electrons

• 24 protons, 12 neutrons and 12 electrons

• 12 protons, 12 neutrons and 12 electrons

• 12 protons, 24 neutrons and 12 electrons

The reaction between copper nitrate and zinc to produce zinc nitrate and copper is a

• precipitation reaction

• decomposition reaction

• single displacement reaction

• double displacement reaction

In your experiment using calcium carbonate and hydrochloric acid to measure rate of reaction, which factor DECREASES the rate?

• using a smaller volume of acid

• increasing the temperature

• using a more concentrated acid

• using larger pieces of calcium carbonate

All elements in period 3 of the periodic table

• have the same number of valence electrons

• belong in the same group of the periodic table

• have metallic properties

• have valence electrons in the same energy level

A catalyst is

• a reactant

• a product

• a chemical that increases rate but is not used up in a reaction

• a solvent

What is the electron configuration for the magnesium ion?

• 2,8

• 2,8,2

• 12

• 10

What is the formula for aluminium carbonate?

• AlCO₃

• Al₃CO₃

• Al₂(CO₃)₃

• Al₃(CO₃)₂

What is the formula for magnesium carbonate?

• MgCO₃

• MgCO

• Mg₂(CO₃)₂

• Mg₂CO₃