Everything is made of atoms. Atoms themselves are made of smaller particles. Elements can join together in different ways to form compounds with different properties.
What is the centre of an atom called?
What is the charge on an electron?
Which of the three sub-atomic particles is the lightest?
If atoms contain charged particles, why do they not have a charge?
They contain the same number of protons as electrons
The charge is locked away in the nucleus
They contain equal numbers of protons and neutrons
What is the atomic number of an atom equal to?
The number of protons in the nucleus
The number of neutrons in the nucleus
The numbers of protons and neutrons in the nucleus
Where are the electrons inside an atom?
The electrons are in the nucleus of an atom
They are arranged in energy levels
The electrons are spread equally throughout the atom
Which elements have similar chemical properties?
Elements in the same period of the periodic table
Elements with the same number of electrons in their outer energy level
Elements with similar mass numbers
What name is Group 7 of the periodic table known by?
Sodium and chlorine react together to form the compound sodium chloride. How are sodium and chlorine held together in this compound?
Sodium and chlorine share electrons and are held together by their attraction for the shared pair of electrons
Sodium and chlorine join together to form molecules
Positive sodium ions and negative chloride ions form a crystal lattice
Which elements are found in the compound calcium carbonate?
Calcium, carbon and oxygen
Calcium and carbonate
Calcium and carbon