A covalent bond is a chemical bond where two atoms share__________.

• protons

• neutrons

• valence electrons

• the same group on the periodic table

Tags

NGSS.HS-PS1-1

Covalent bonds form between 2 or more atoms of ______________.

• metals

• metaloids

• nonmetals

• I don't know

Tags

NGSS.HS-PS1-1

A molecule is a group of atoms held together with ________________ that acts as an independent unit.

• covalent bonds

• ionic bonds

• metallic bonds

• isotopic bonding

Tags

NGSS.MS-PS1-1

A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons is a _______________.

• nonpolar molecule

• polar molecule

• ionic compound

• metalic compound

Atoms of a polar molecule share their atoms ___________.

• Equally

• Unequally

Polar molecules will dissolve in other polar molecules and nonpolar molecules will dissolve in other nonpolar molecules.

• True

• False

Polar molecules have

• no charges.

• slight positive and negative charges on opposite ends of the molecules.

• only positive charges.

• either positive or negative charges, but not both.

Tags

NGSS.HS-PS2-6

The attractions between water molecules are called a __________________.

• gravity force

• dipole force

• nuclear force

• I don't know!

Why is it difficult to wash oil from your hands with plain water?

• Both substances are polar. Like polarities repel.

• Both substances are nonpolar. Like polarities repel.

• Water is nonpolar, and oil is polar, so they will not combine.

• Water is polar, and oil is nonpolar, so they will not combine.

The boiling point of polar molecules is __________ the boiling point of nonpolar molecules.

• lower than

• equal to

• higher than