Chemical Chaos

symbol of sodium

• k

• Fe

• Na

• Ag

A copper penny turning greenish after a few years is an example of ...

• Chemical Change
• Physical Change

Which of the following is a molecule?

• copper

• ferrum

• oxygen we inhale

• none of these

What three forms can chemicals come in?

• solid, air, and juice

• Crystal, plasma, and steam

• Fire, air, and water

• solid, liquid, and gas

A scoop of baking soda is added to a beaker containing vinegar. The baking soda disappears and bubbles are observed. This is an example of a change.

(a)  

• chemical

• ionic

• phase

• physical

Why is it possible to bend metals?

• The atoms aren't actually joined together.

• The atoms are joined together loosely.

• Most metals have some rubber in them.

What is an ionic bond?

• A bond made of iron.

• A type of superglue.

• A bond where electrical force binds atoms together.

What is vinegar made from?

• Wine that has gone sour.

• Apple juice mixed with yeast.

• Grape juice and carbon dioxide.

What precious gems are used in lasers?

• Rubies

• Diamond

• Pearls

• Golden Nuggets

What is an emulsion?

• An acid found in seaweed.

• An alkali found in soap.

• A combination of chemicals that don't mix properly.

• Chemicals that mix properly.