Semester 1 Final Exam Review

Front

How many valence electrons does a carbon atom have?

Back

4

Front

Which elements are colored red on the periodic table?

Back

Nonmetals

Front

Scientific questions must be...

Back

Measurable/Investigated

Front

What is the product of the following nuclear reaction: \(^{31}_{13}Al \rightarrow ^{0}_{+1}e + ?\)

Back

\(^{31}_{12}Mg\)

Front

Which of the following is a pure substance? Water, Salad, Chocolate milk, All of them

Back

Water

Front

What is 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

Define a pure substance.

Back

A pure substance is a material that has a constant composition and consistent properties throughout.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms.

Front

What are nonmetals?

Back

Nonmetals are elements that typically lack the characteristics of metals and are found on the right side of the periodic table.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements chemically bond, while a mixture is a combination of two or more substances that retain their individual properties.