Which of the following bond types/interactions is the weakest?

• Van der Waals

• ionic bonds

• covalent bonds

• hydrogen bonds

What do we call an atom that has lost or gained electrons?

• ion

• metal

• nonmetal

• isotope

Which of the following statements are correct?

A. Protons have a positive charge.

B. Electrons have a negative charge.

C. Neutrons have a positive charge.

• A

• B

• A + B

• C

• A + C

Atoms of a given element ALWAYS contain the same number of ______________.

• protons and electrons

• protons and neutrons

• neutrons and electrons

• all of these

• none of these

Tags

NGSS.HS-PS1-8

A solution with a pH of 2 is _____ times more ______ than a solution with a pH of 4.

• 2 , acidic

• 20 , acidic

• 100 , acidic

• 20 , basic

• 2 , basic

An acid has a pH ______________ 7.

• less than

• more than

• equal to

What type of bond shares electrons?

• covalent

• ionic

• hydrogen

• van der waals

What type of bond transfers electrons?

• ionic

• covalent

• hydrogen

• van der waals

Water is an example of a _____________ substance.

• polar

• ionic

• living

• nonpolar

Which of the following is the lowest level of biological organization that can perform all the activities required for life?

• atom

• tissue

• cell

• organism

Tags

NGSS.MS-LS1-1