Biology 2.1-2.2

___ bonds share valence electrons with other atoms.

• Covalent

• Ionic

• Electronic

• Conductive

Tags

NGSS.HS-PS1-2

What type of bonds are present in this diagram?

• metallic

• concurrent

• ionic

• covalent

The "Octet Rule" states that atoms like to have ___ valence electrons.

• 8

• 6

• 18

• 10

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

The atomic number tell us ___.

• the number of neutrons

• the atomic mass of the element

• the number of protons

• when the atom was discovered

A substance that cannot be broken down into simpler chemical substances is called ___.

• an atom

• an element

• a compound

• a covalent bond

Which feature of water explains why water has high surface tension?

• Water resists temperature changes.

• What is a polar molecule.

• Water expands when it freezes.

• Water has a high density.

The atoms in a water molecule are bonded by ___.

• ionic bonds

• metallic bonds

• hydrogen bonds

• covalent bonds

The weak bond that holds one water molecule to another water molecule is called a ___.

• polar bond

• covalent bond

• hydrogen bond

• ionic bond

Hydrogen, chlorine, and sodium are examples of ___.

• compounds

• elements

• molecules

• isotopes

Tags

NGSS.HS-PS1-1

In a water molecule, the ___ end is negative.

• oxygen

• hydrogen

• carbon

• nitrogen

Tags

NGSS.HS-ESS2-5