Chemistry Atoms And Atomic Structure

Front 1

The atoms in an element are:

1.All the same type
2.Two types joined together
3.About a hundred different types

Back 1

1.All the same type

Front 2

An atom consists of:

1.An electron surrounded by a nucleus
2.A nucleus containing electrons
3.A nucleus surrounded by electrons

Back 2

3.A nucleus surrounded by electrons

Front 3

What is the correct chemical symbol for sodium?

1.NA
2.Na
3.na

Back 3

2.Na

Front 4

What do we get when two or more different types of atom join together using chemical bonds?

1.A mixture
2.A compound
3.A new element

Back 4

2.A compound

Front 5

What are groups in the periodic table?

1.A row of similar elements
2.A column of similar elements
3.The boxes in the table

Back 5

2.A column of similar elements

Front 6

What do chemical bonds involve?

1.A nucleus moving from one atom to another
2.Electrons being transferred from one nucleus to another
3.Electrons being shared between two atoms

Back 6

3.Electrons being shared between two atoms

Front 7

A unit of magnesium carbonate contains one magnesium atom, one carbon atom and three oxygen atoms. What is its chemical formula?

1.MgC3O
2.Mg(CO)3
3.MgCO3

Back 7

3.MgCO3

Front 8

Which statement about chemical reactions is correct?

1.The mass of products equals the mass of reactants
2.The mass of products is more than the mass of reactants
3.The mass of products is less than the mass of reactants

Back 8

1.The mass of products equals the mass of reactants

Front 9

The correct balanced equation for the reaction between magnesium and oxygen is:

1.Mg + O ==> MgO2
2.Mg + O2 ==> Mg2O
3.2Mg + O2 ==> 2MgO

Back 9

3.2Mg + O2 ==> 2MgO