Chemistry Review and Properties of Water

The weak hydrogen bonds in water explain:

• Why water droplets can connect with other water droplets

• Why water beads stick to you

• Why water can travel up plant stems

• Why all substances, except oil, can mix with water

bonds are bonds between atoms that:

• Share electrons

• Transfer electrons

• Share neutrons

• Share protons

Ionic bonds are created when two or more atoms transfer electrons to each other.

• True

• False

Polarity refers to:

• The amount of energy it takes to heat water

• Water molecules ability to stick to other water molecules

• Small explosions

• The unequal charge of water molecules

Anything that takes up space and has mass is known as _______________.

• Matter

• Molecules

• Compounds

• Stuff

An atom's atomic number will tell you how many protons it has.

• True

• False

Which sub-atomic particle is responsible for reactions between most atoms?

• Proton

• Neutron

• Electron

• None of these

A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black substance that makes up the tarnish on the surface of silver objects. To remove the tarnish from the ring, students placed it in a pan lined with aluminum foil and added hot water. Baking soda was added to the hot water and stirred. Students made observations about the process. Which observation of this process provides evidence of a chemical reaction?

• Hot water heated the aluminum foil.

• The liquid solution changed color.

• The pan was lined with aluminum foil.

• The hot water cooled.

Tags

NGSS.MS-PS1-2

If you have a beaker of water, how can you find the mass of only the water?

• Difference Method

• Direct Method

• Substance Method

When you heat them up, what happens to the space between particles

• The space decreases

• The space increases

• The space stays the same

Tags

NGSS.MS-PS1-4