Quiz #1 Review (Atoms, Elements, Compounds, Water)

Which property of water makes it possible for the basilisk lizard to stride on water? (Select all that apply.)

• Covalent bonding within water molecules

• Hydrogen bonding between water molecules

• High surface tension

• Capillary action

Slight negative charges around the oxygen atom and the slight positive charges of hydrogen atoms form polar molecules that exhibit hydrogen bonding in water.

• True

• False

• Maybe

• Really?

For salt (NaCl) to dissolve in water, the negatively charged Cl^- will be attracted to the slightly positive charge ​ (a)   atom.

• Hydrogen
• Oxygen
• None

Which of these does NOT easily dissolve in water?

• other polar molecules such as ammonia

• other molecules that form ions such as NaCl or salt

• other nonpolar molecules such as methane

• All of the above

Based on the image below from the periodic table of elements, how many protons are in an atom of silver?

• 47

• 108

• 155

• Cannot be determined

Where is the mass of an atom located? Point on it in the atom.

If an atom has 12 protons, 13 neutrons, and 12 electrons, what is the mass of the atom?

• 12

• 13

• 24

• 25

How many covalent bonds are there in the picture of water molecules?

• 2

• 3

• 6

• 9

The drop of water from the faucet shows what property of water?

• Cohesion

• Adhesion

• Less dense as ice

• Surface tension

The image shows atoms of the same element.

• True

• False

• Maybe

• Who knows?