Biology-Chapter 2 Review

Atoms in molecules share pairs of electrons when they form _____.

• covalent bonds.

• ionic bonds.

• hydrogen bonds.

• polymers.

Tags

NGSS.HS-PS1-1

The smallest unit of matter is the _____.

• molecule.

• atom.

• compound.

• cell.

Tags

NGSS.MS-PS1-1

What type of bond forms when an atom gains or loses electrons?

• covalent

• compound

• molecule

• ionic

Tags

NGSS.HS-PS1-1

What moves around the nucleus?

• protons and neutrons

• neutrons

• protons

• electrons

A very strong base might have a pH of _____.

• 3

• 5

• 9

• 13

The nucleus of an atom contains _____.

• protons and neutrons

• neutrons and electrons

• protons and electrons

• protons, neutrons, and electrons

Tags

NGSS.HS-PS1-8

The protons of an atom _____.

• are found in the nucleus along with the electrons.

• occupy the space surrounding the nucleus.

• have a positive charge.

• are attached to the positive charge of neutrons.

*What type of reaction is shown below?

• hydrolysis

• dehydration synthesis

• hydrogenation

• ionization

The ability of water molecules to stick to each other is called _____, and the ability of water molecules to stick to the other surfaces is called _____.

• cohesion; cohesion

• cohesion; adhesion

• adhesion; cohesion

• adhesion; adhesion

Tags

NGSS.HS-ESS2-5

Water molecules form which type of bond with other water molecules?

• covalent bonds

• ionic bonds

• van der Waals forces

• hydrogen bonds