8th Grade Science EOG Review-Chemistry

Front

What are Noble gases?

Back

Noble gases are elements found in family 18 of the periodic table that have a full shell of valence electrons, making them unreactive.

Front

What is the sequence of elements in Period 5 of the periodic table?

Back

The sequence includes highly reactive metals, relatively nonreactive metals, metalloids, reactive nonmetals, and nonreactive gases.

Front

What do H2O and H2O2 demonstrate about elements?

Back

They demonstrate that elements can combine in many different ways to form various compounds.

Front

What is an example of a chemical change?

Back

Cooking an egg is an example of a chemical change.

Front

What may happen during a physical change?

Back

Phase changes may occur due to a change in temperature.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number, showing periodic trends.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together.