Science 8 - Q3

What is the smallest unit of an element that retains its chemical properties?

• Atom

• Molecule

• Proton

• Electron

Which subatomic particle has a positive charge?

• Neutron

• Proton

• Electron

• Nucleus

What is the nucleus of an atom primarily composed of?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Electrons and positrons

What is the atomic number of an element equal to?

• Number of protons

• Number of neutrons

• Number of electrons

• Number of nucleons

Which of the following represents the mass number of an atom?

• Number of protons

• Number of neutrons

• Number of electrons

• Number of nucleons

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Variable

The chemical properties of an atom are primarily determined by the:

• Number of protons

• Number of neutrons

• Number of electrons

• Mass number

Isotopes of an element have the same number of:

• Protons

• Neutrons

• Electrons

• Nucleons

Which type of bond involves the sharing of electrons?

• Ionic

• Covalent

• Metallic

• Van der Waals

According to the Rutherford model of the atom, most of the atom's mass is concentrated in the:

• Nucleus

• Protons

• Electrons

• Neutrons