Polarity of Water

How many Hydrogen atoms does a single water molecule have?

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

What does "polar" mean?

• A molecule is cold
• A molecule has ionic bonds
• A molecule has covalent bonds
• A molecule has areas of positive and negative charge

This atom in a water molecule has more of a negative charge

• Oxygen
• Hydrogen

Tags

NGSS.HS-PS1-3

Why does alcohol evaporate faster than water?

• It heats up quicker
• It has bigger molecules
• The molecules are not as attracted to each other

What causes water to "bead up" and stick together better than oil or alcohol?

• Surface Tension
• molecular bonds
• Electricity
• Stickiness

Salt dissolves in water because

• The water molecules wiggle between the Na and Cl atoms
• Water gets warm and moves around too much
• The polar areas of water molecules stick to the Na and CL ions

Tags

NGSS.HS-PS1-3

When two substances are mixed, the substance that is dissolved is called the:

• solvent
• solute

When two substances are mixed, the substance that does the dissolving is the:

• solvent
• solute

True or false: Sucrose (sugar) is a polar molecule like water

• True
• False

True or false: Each substance dissolves in water differently, depending on its atoms and bonds

• True
• False