Semester 1 test reg chemistry 2024-2025

Front

Subatomic particles with a negative charge

Back

Electrons are subatomic particles that carry a negative charge and are found in the electron cloud surrounding the nucleus of an atom.

Front

Total number of electrons in each sublevel: s, p, d, f

Back

The total number of electrons in each sublevel is: s - 2, p - 6, d - 10, f - 14.

Front

Formula for tetraphosphorous hexaoxide

Back

The correct formula for tetraphosphorous hexaoxide is P4O6.

Front

Formula for lead (II) sulfide

Back

The correct formula for lead (II) sulfide is PbS.

Front

Molecular formula for carbon tetrachloride

Back

The correct molecular formula for carbon tetrachloride is CCl4.

Front

Definition of an ion

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.

Front

Definition of a molecule

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the difference between ionic and covalent compounds?

Back

Ionic compounds are formed by the transfer of electrons from one atom to another, while covalent compounds are formed by the sharing of electrons.