Diagnostic Test A Level Chemistry

What are the positively charged particles in an atom?

• Protons

• Neutrons

• Electrons

• Nucleon

Anything that takes up space and has mass is known as _______________.

• Matter

• Molecules

• Compounds

• Atom

Which of the following symbols identifies a substance dissolved in water?

• (s)

• (l)

• (g)

• (aq)

A(n) ____________________ is a pure substance made of a single type of atom and cannot be broken down.

• Element

• Compound

• Molecule

• Mixture

What does the ATOMIC MASS tell us about an atom?

• Protons + Neutrons

• Protons + Electrons

• Neutrons + Electrons

What is an element?

• Two or more atoms joined together.

• One of over 100 types of atoms

• Two or more different elements joined together.

• A particle with no charge found in the nucleus of an atom.

What is a molecule?

• two elements bonded together (sharing electrons)

• a mixture of different substances

• smallest individual particles

• salt mixed in water

What is a compound?

• the simplest form of a substance

• a combination of 2 or more elements

• a combination only of 3 elements

• Two substances stuck together with glue.

What two subatomic particles are found in the nucleus?

• proton and electron

• electron and neutron

• neutron and proton

• neutron and electron

Which of the following statements regarding subatomic particles is incorrect?

• Protons are positively charged particles and neutrons have no charge

• In a neutral atom, the number of protons equals the number of electrons

• The relative mass of proton, electron and neutron the same

• Isotopes of an elements have the same number of protons but a different number of neutrons