Molecular Structure Review

Which of the following are more like elements?

• atoms

• molecules

• ionic compounds

• covalent compounds

Some substances are molecules, which are a group of atoms that are

• held together by chemical bonds

• not bonded together

• different shapes and sizes

• different colors

Tags

NGSS.MS-PS1-1

True or False

There are both nonmetal gases and nonmetal solids.

• True

• False

Metals are mostly ______ at room temperature.

• Solid

• Liquid

• Gas

When you hit a metal with a hammer, and it bends but does not break, this means that the substance is _______

• soft

• stretchy

• malleable

• brittle

Why does oil not dissolve in water?

• Oil is an extended structure, and water is made of polar molecules.

• Oil is an extended structure, and water is made of nonpolar molecules.

• Oil is made of nonpolar molecules, and water is made of polar molecules.

• Oil is made of polar molecules, and water is made of nonpolar molecules.

Tags

NGSS.MS-PS1-1

In general, nonmetals are ____ since they are composed of individual atoms or small molecules.

• good conductors of electricity

• malleable and ductile

• good conductors of heat

• gases at room temperature

How many atoms of hydrogen are in

C₆H₁₂O₆

• 6

• 12

• 18

• 2

Tags

NGSS.MS-PS1-1

Which of the following is a polar covalent compound?

• Oil

• Sugar

• Carbon dioxide

• Helium

Tags

NGSS.HS-PS1-1

Nonpolar covalent compounds do not ______ in water.

• Dissolve

• Melt

• Evaporate

• Conduct