Chemical Basis of Life Review

What charge does a neutron have?

• Positive

• Negative

• Neutral

• Double positive

What is the charge of an electron?

• Positive

• Negative

• Neutral

• Double negative

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the charge of an ion that has gained an electron?

• Positive

• Negative

• Neutral

• Double positive

What type of bonds form between different molecules of water?

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Metallic bonds

What is the charge of the oxygen atom in a water molecule?

• Slightly positive

• Slightly negative

• Neutral

• Highly positive

Tags

NGSS.MS-PS2-3

What is the polarity of water molecules?

• Water molecules are slightly positive on the oxygen side and slightly negative on the hydrogen side.

• Water molecules are slightly positive on the hydrogen side and slightly negative on the oxygen side.

• Water molecules have no charge.

• Water molecules are equally positive and negative on both sides.

What is adhesion in terms of water properties?

• Molecules sticking to each other

• Molecules sticking to other substances

• Molecules repelling each other

• Molecules dissolving in water

Why is water considered a universal solvent?

• It dissolves fewer substances than other solvents.

• It dissolves more substances than any other solvent.

• It only dissolves organic substances.

• It cannot dissolve salts.

What is the solvent in a solution?

• The substance that is dissolved

• The solid part of a solution

• The liquid part of a solution present in larger amount

• The gas part of a solution

What is the solute in a solution?

• The substance that is dissolved by the solvent

• The liquid part of a solution

• The gas part of a solution

• The solid part of a solution