Chemical Bonding/Counting Atoms

What is a chemical formula?

• Shows what elements a compound contains and the exact number of the atoms of each element in a unit of that compound.

• Shows the charge on an ion.

• Shows the actual names of each element.

• Shows what column an element is in.

Tags

NGSS.MS-PS1-1

A _________________written after a symbol tells how many atoms of that element are in a unit of the compound.

• chemical formula

• subscript

• covalent bond

• hydrate

If a chemical symbol in a compound has no subscript, the compound contains__________________ of that element.

• 0

• 1

• 2

• 3

The ________________ are stable because they each have a complete outer energy level.

• Halogens

• Alkali metals

• Alkaline earth metals

• Noble gases

Tags

NGSS.HS-PS1-1

What number of valence electrons (outer energy level electrons) are needed for most elements to be considered stable or have a full outer energy level?

• 1

• 4

• 7

• 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A __________________is the force that holds atoms together in a compound.

• chemical bond

• chemical formula

• hydrate

• binary compound

Tags

NGSS.HS-PS1-3

NGSS.HS-PS1-4

A/An _____________is a charged particle because it now has either more or fewer electrons than protons.

• hydrate

• subscript

• ion

• covalent

Tags

NGSS.MS-PS2-3

A/An ________________ is the force of attraction between the opposite charges of the ions in an ionic compound.

• covalent bond

• ionic bond

• subscript bond

• force bond

Tags

NGSS.HS-PS1-3

The attraction that forms between atoms when they share electrons is known as a(an)___________________.

• ionic bond

• covalent bond

• nitrogen bond

• compound bonding

A neutral particle that forms as a result of electron sharing is called a(an) ________________.

• ion

• ionic bond

• molecule

• subscript

Tags

NGSS.MS-PS1-1