Unit 2 Final Review (Chemistry)

Front

How many valence electrons does a neutral Aluminum have?

Back

3

Front

What is the abbreviation for the element that bonds with Oxygen to form X2O and is a stable ion with 10 electrons?

Back

Na

Front

If 1 table has 4 legs, 2 legs equal 5 bolts, and 3 bolts equal 2 washers, how many washers are needed to make 6 tables?

Back

40

Front

What is the measurement of a liquid that could be 2.45, 2.44, 2.43, 2.46, or 2.47?

Back

2.45, 2.44, 2.43, 2.46, 2.47

Front

Convert 423 micrometers into meters.

Back

0.423

Front

What is the definition of a valence electron?

Back

A valence electron is an electron that is associated with an atom and can participate in the formation of a chemical bond.

Front

What is the significance of the octet rule in chemistry?

Back

The octet rule states that atoms tend to bond in such a way that they have eight electrons in their valence shell, achieving a stable electron configuration.

Front

Define ionic bond.

Back

An ionic bond is a type of chemical bond that occurs when one atom transfers electrons to another atom, resulting in the formation of charged ions.

Front

What is the formula for calculating density?

Back

Density = Mass/Volume.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.