Atom

What is the meaning of the term "atom" in Greek?

• Unseen

• Uncut

• Uncertain

• Uncommon

What is the effect of differences in the number of neutrons in the nuclei of atoms of the same element?

• Change in atomic weight

• Change in physical properties

• Change in chemical properties

• Change in atomic number

Which type of compounds are produced through the sharing of electron pairs between atoms?

• Covalent compounds

• Hydrogen compounds

• Metallic compounds

• Ionic compounds

Which process involves the loss of electrons by an element?

• Reduction

• Oxidation

• Covalent bonding

• Ionization

What is the term used to identify the number of protons in an atom?

• Atomic mass

• Isotope number

• Atomic number

• Valence number

The mass of an atom is primarily concentrated in its nucleus.

• True

• False

Chemical properties of elements are solely determined by the number of protons in the nucleus.

• True

• False

Oxidation involves the gain of electrons by an element.

• True

• False

The activity of metals and non-metals is related to the size of the atom and to the number of electrons in the external orbit.

• True

• False

Covalent compounds generally have high boiling points.

• True

• False