Midterm Review-8th Grade-2024

Front

What are the vertical columns in the Periodic Table called?

Back

Groups

Front

How many oxygen atoms are in Al₂(SO₄)₃?

Back

12

Tags

NGSS.MS-PS1-1

Front

What is more likely for an atom with 3 valence electrons: to gain 5 electrons or to lose 3 electrons?

Back

Lose 3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Front

What type of change occurs when iron rusts?

Back

Chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What does Newton's 1st Law state?

Back

An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Front

What are the horizontal rows in the Periodic Table called?

Back

Periods

Front

What is the formula to calculate the number of oxygen atoms in a compound?

Back

Count the subscript of O in the formula.

Front

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

Back

A chemical change results in the formation of new substances, while a physical change does not.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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 is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Tags

NGSS.MS-PS1-5