Unit 4 Chemical Bonding

A chemical                    is the force that holds atoms together in a compound.

• bond

• formula

• compound

• element

Tags

NGSS.MS-PS1-5

A chemical                  tells what elements a compound contains and the exact number of atoms for each of those elements.

• chart

• dot diagram

• table

• formula

A subscript in a formula shows:

• the charge on the compound

• the charge on the atom

• the number of atoms of an element in that compound

• the valence electrons

How many Sulfur atoms are there in the compound CaSO4 ?

• 6

• 1

• 0

• 4

Tags

NGSS.MS-PS1-1

The noble gases do not form compounds in nature because:

• These elements have no electrons

• they already have filled outer energy levels

• they have three energy levels

• they all have empty outer energy levels

The three in 3 Si₂0 stands for:

• the number of molecules of Si₂O

• the sum of the oxidation numbers in Si₂O

• the number of atoms in Si₂O

• the net number of valence electrons in Si₂O

Tags

NGSS.MS-PS1-1

How many valence electrons does oxygen have?

• 6

• 2-

• 16

• 1

An atom that has lost or gained an electron to get a filled outer energy level becomes a charged particle called an:

• oxidation rule

• polar rule

• valence rule

• octet rule

An atom that has lost or gained an electron to get a filled outer energy level becomes a charged particle called an:

• isotope

• plasma

• ion

• coefficient

Lithium would most likely form a:

• positive ion

• covalent bond

• negative ion

• diatomic