Atoms and Molecules

The three basic components of an atom are:

• protons, neutrons, and ions

• protons, neutrons, and electrons

• protons, neutrinos, and ions

• protium, deuterium, and tritium

The nucleus of an atom consists of:

• electrons

• neutrons

• protons and neutrons

• protons, neutrons and electrons

A single proton is ________________ charged

Which particles have approximately the same size and mass as each other?

• neutrons and electrons

• electrons and protons

• protons and neutrons

• none - they are all very different in size and mass

Which two particles would be attracted to each other?

• electrons and neutrons

• electrons and protons

• protons and neutrons

• all particles are attracted to each other

The atomic number of an atom is:

• the number of electrons

• the number of neutrons

• the number of protons

• the number of protons plus the number of neutrons

Electrons are found in the ____________ __________.

Select the options that are TRUE for neutrons

• negatively charged

• have no charge

• found in the nucleus

• neutrons + protons is equal to the mass number

Select the options that are FALSE for protons

• have a positive charge

• are bigger than neutrons

• the number of protons says what atom it is

• protons + electrons = atomic number

Molecules are made up of different types of atoms

• True

• False