Chemistry Quiz

What is the smallest part of an element that retains its identity in a chemical reaction?

• Molecule

• Proton

• Atom

• Neutron

The nucleus of an atom contains:

• Protons and neutrons

• Electrons and neutrons

• Only protons

• Protons and electrons

The mass of an electron is approximately:

• The same as a proton

• 1/1836 of the mass of a proton

• Double that of a neutron

• Equal to the mass of a hydrogen atom

The number of protons in the nucleus of an atom is called the:

• Mass number

• Atomic number

• Isotope number

• Neutron number

Isotopes are atoms that have the same number of protons but differ in the number of:

• Electrons

• Neutrons

• Protons

• Molecules

What force drives chemical reactivity in atoms?

• Achieving a stable electron configuration

• Nuclear fusion

• Increasing atomic mass

• Gaining neutrons

Group 1 elements, like sodium, tend to:

• Gain 1 electron

• Lose 1 electron

• Gain 2 electrons

• Lose 2 electrons

The most stable electron configuration is found in:

• Noble gases

• Alkali metals

• Halogens

• Transition metals

Which of the following can be found in a p-orbital?

• Up to 6 electrons

• Up to 2 electrons

• Up to 10 electrons

• Up to 14 electrons

What did Bohr's model describe electrons as?

• Orbiting the nucleus in fixed paths

• Moving randomly around the nucleus

• Behaving like particles in orbitals

• A wave of probability