Covalent Compounds and Molecular Formulas

A(n) _________ is a neutral group of atoms that are held together by covalent bonds.

• ionic compound

• molecule

• chemical formula

• molecular formula

A _________ formula indicates the relative number of atoms of each kind in a chemical compound by using atomic symbols and numerical subscripts.

• chemical

• nuclear symbol

For the molecular formula H₂O there are

• 2 hydrogen atoms and 2 oxygen atoms

• 2 hydrogen atoms and 1 oxygen atom

• 1 hydrogen atom and 1 oxygen atom

• cannot be determined

Tags

NGSS.MS-PS1-1

A bond in which electrons are shared is called _______ bond

• covalent

• ionic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Nature favors chemical bonding because most atoms have lower potential energy when they are bonded to other atoms in comparison to when they are by themselves.

• True

• False

Tags

NGSS.HS-PS1-4

_____ Rule states that chemical compounds form so that each by gaining, losing or sharing electrons has a 8 electron in its highest energy level.

• Duet

• Noble Gas

• Octet Rule

Electron Dot Notation shows

• the protons in an atom

• the protons and neutrons in an atom

• all electrons in an atom

• the valence electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Lone pair (or unshared pair) of electrons are

• involved in bonding

• not involved in bonding

Which of the following of formula indicates the kind, number, arrangement and bonds in an a molecule?

• chemical

• molecular

• structural

In a single bond there are _______ electrons.

• 1

• 2

• 4

• 6