First Semester Chemistry

The smallest particle of an element that retains the properties of that element are

• protons

• electrons

• atoms

• neutrons

A negatively charged subatomic particle is a

• protons

• electrons

• atoms

• neutrons

The total number of protons and neutrons in the nucleus of an atom is the

• mass number

• atomic number

• atomic mass

• atomic mass unit

The weighted average of the masses of the isotopes of an element is the

• mass number

• atomic number

• atomic mass

• atomic mass unit

The ability of an atom to attract electrons when the atom is in a compound is

• ionization energy

• electronegativity

• periodic law

• Aufbau principle

Energy required to remove an electron from an atom is

• ionization energy

• electronegativity

• periodic law

• Aufbau principle

The type of element that is a good conductor of heat and electricity is

• metal

• nonmetal

• metalloid

• gas

Which of the following is true about subatomic particles?

• Electrons are negatively charged and are the heaviest subatomic particle.

• Protons are positively charged and are the lightest subatomic particle.

• Neutrons have no charge and are the lightest subatomic particle.

• The mass of a neutron equals the mass of a proton.

The particles that are found in the nucleus of an atom are

• neutrons and electrons

• electrons only

• protons and neutrons

• protons and electrons

The atomic number of an element is the total number of which particles in the nucleus?

• neutrons

• protons

• electrons

• protons and electrons