Physical Science Semester 1 Exam Review

Front

What determines an element's chemical properties primarily?

Back

Number of valence electrons.

Front

What are main group elements also known as?

Back

Representative elements.

Front

Which group contains elements that rarely form compounds?

Back

Noble gases.

Front

What type of bond typically forms between a metal and a nonmetal?

Back

Ionic bond.

Front

What describes the reactivity trend in Group 1 (alkali metals)?

Back

Increases going down.

Front

Define valence electrons.

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Front

What is an ionic bond?

Back

A chemical bond formed between two ions with opposite charges.

Front

What are noble gases?

Back

Elements in Group 18 of the periodic table that are mostly unreactive due to having a full valence shell.

Front

What is the periodic trend for atomic radius across a period?

Back

Atomic radius decreases from left to right across a period.

Front

What is the significance of the octet rule?

Back

Atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.