Year 9 Semester 1 Exam Revision

What is an atom?

• The building block of all matter

• A type of compound

• An element

• A very strong lattice

The first two elements on the periodic table are:

• Lithium and Beryllium

• Hydrogen and Helium

• Lithium and Sodium

• Boron and Carbon

What are the two particles that make up the nucleus of an atom?

• Pistons and electrons

• Pistons and neutrons

• Protons and electrons

• protons and neutrons

Most of an atom is taken up by:

• The nucleus

• Charged particles

• Empty space

• Moving particles.

The symbol for sodium is:

• So

• Sd

• Sm

• Na

Which of the following is an example of a metalloid?

• Silicon

• Iron

• Carbon

• Steel

Atoms of an element can have different mass due to them having different amounts of neutrons. These are known as:

• Compounds

• Quarks

• Neutrinos

• Isotopes.

An ion is:

• An atom that has not gained or lost an electron

• An atom with an overall electric charge

• An atom that is sharing electrons

• An atom that has a neutral overall charge

The periodic table arranges all of the elements in order of increasing:

• Reactivity

• Atomic number

• Mass number

• Mass arrangement

Argon has an atomic number of 18. How many electrons does a neutral argon atom possess?

• 9

• 18

• 72

• 36