Pre-course Diagnostic test for A-Level Chemistry

Front

What are the positively charged particles in an atom?

Back

Protons

Front

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

Back

Matter

Front

The nucleus of an atom is made up of...

Back

Protons and Neutrons

Front

What does the ATOMIC MASS tell us about an atom?

Back

Protons + Neutrons

Front

What does the atomic number tell us about an atom?

Back

The number of protons

Front

Which statement about subatomic particles is incorrect? Options: Protons are positively charged and neutrons have no charge; In a neutral atom, protons equal electrons; The relative mass of proton, electron, and neutron is the same; Isotopes have the same protons but different neutrons.

Back

The relative mass of proton, electron, and neutron is the same.

Front

Isotope

Back

Atoms that have the same number of protons but different numbers of neutrons

Front

Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208. The average atomic mass of lead is 207.2. Which isotope of lead is likely to be the most abundant?

Back

207

Front

What is an element?

Back

All the atoms of an element contain the same number of protons

Front

What is a molecule?

Back

Two or more atoms bonded together and sharing electrons