Advanced Biology unit 3 review

Name the 3 subatomic particles of an atom.

• Proteins

• Electrons

• Neutrons

• Protons

Protons have a ____ charge.

• Positive

• Negative

• No charge

Electrons have a ____ charge.

• Positive

• Negative

• No charge

Ionic bonds share electrons

• true

• false

If an atom loses an electron, it will then have a ______ charge.

• positive

• negative

• no change

Covalent Bonds share electrons

• True

• False

Which of the following statements about water is false?

• Oxygen has a stronger attraction to electrons then hydrogen.

• Hydrogen has a slightly positive charge

• Oxygen has a slightly positive charge

• Water is an example of a polar covalent bond

The Oxygen atoms in the molecule shown have this charge:

• Positive

• Partial Positive

• Negative

• Partial Negative

The Hydrogen atoms in the molecule shown have this charge:

• Positive

• Partial Positive

• Negative

• Partial Negative

Which of the following is LEAST likely to dissolve in water?

• nonpolar fats and oils
• polar sugar molecules
• salt made of a positive sodium ion and a negative chloride ion
• all of the substances will dissolve easily in water