CIE IGCSE Chemistry Quiz: Atomic Structure & the Periodic Table

What is an element?

• A combination of two or more substances that are chemically combined

• A pure substance made of two or more elements chemically combined

• A substance made of atoms with different numbers of protons

• A substance made of atoms that all contain the same number of protons

What is a compound?

• A mixture of elements that can be separated by physical means

• A pure substance made of two or more elements chemically combined

• A combination of two or more substances that are not chemically combined

• A substance made of atoms that all contain the same number of protons

What is the charge of a neutron?

• 1+

• 1-

• 2+

• Neutral

What does the atomic number represent?

• The number of neutrons in an atom

• The mass of an atom

• The total number of protons and neutrons in the nucleus

• The number of protons in the nucleus of an atom

How many electrons can the first shell hold?

• 4

• 8

• 2

• 18

What is the electronic configuration of sodium?

• 2,8,1

• 2,8

• 2,1

• 2,8,2

What are isotopes?

• Atoms of different elements with the same number of protons

• Different atoms of the same element with different numbers of neutrons

• Atoms that have the same mass number

• Atoms that are chemically combined

What is the relative atomic mass unit based on?

• The mass of a nitrogen atom

• The mass of a hydrogen atom

• The mass of a carbon-12 atom

• The mass of an oxygen atom

Which of the following is a characteristic of noble gases?

• They have full outer shells of electrons

• They are highly reactive

• They have no electrons

• They are found in Group I

What is the mass number of an atom?

• The total number of protons and electrons

• The total number of protons and neutrons

• The number of neutrons only

• The number of protons only