8th Grade Science Review

Front

What is the composition of the compound with 3 magnesium atoms, 6 iron atoms, and 12 oxygen atoms?

Back

The compound consists of 3 magnesium (Mg) atoms, 6 iron (Fe) atoms, and 12 oxygen (O) atoms.

Tags

NGSS.MS-PS1-1

Front

What color are the hottest stars?

Back

The hottest stars are blue.

Front

What determines the reactivity of an element?

Back

The reactivity of an element is determined by its group in the periodic table.

Front

What characteristic do sodium and lithium share?

Back

Sodium and lithium both have one valence electron.

Front

Which particle determines the reactivity of an atom?

Back

Particle Z determines the reactivity of the atom.

Front

What is a chemical property?

Back

A chemical property is a characteristic of a substance that can be observed during a chemical reaction, such as flammability or toxicity.

Tags

NGSS.MS-PS1-2

Front

What is the significance of valence electrons?

Back

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements, organized by increasing atomic number and grouped by similar properties.

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.

Tags

NGSS.MS-PS1-5

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number of an element and its identity.