Exam 1 Lecture 3

Question 0

A gain or loss of electrons forms a(an) __________.

Answer 0

Ion

Question 1

The weakest type of bond is called a(an) __________ bond.

Answer 1

Ionic

Question 2

__________ dissolve in water.

Answer 2

Salts

Question 3

Bonds that share two or more electrons and have no charge are __________ bonds.

Answer 3

Covalent

Question 4

What are covalent bonds?

Answer 4

Bonds that share two or more electrons and have no charge.

Question 5

__________ make or break chemical bonds.

Answer 5

Chemical Reactions

Question 6

What is Electronegativity?

Answer 6

An atoms affinity for electrons.

Question 7

(Polar/Nonpolar) covalent bonds have unequal sharing of electrons.

Answer 7

Polar

Question 8

_____ is essential for life and has the ability to form hydrogen bonds.

Answer 8

Water

Question 9

In water, O to H bonds are highly (polar/nonpolar).

Answer 9

Polar

Question 10

True or False? Hydrogen Bonds are weak.

Answer 10

True

Question 11

__________ is water to water.

Answer 11

Cohesion

Question 12

_________ is water to other polar molecules.

Answer 12

Adhesion

Question 13

Matter has __________ and occupies space.

Answer 13

Mass

Question 14

All matter is composed of __________.

Answer 14

Atoms

Question 15

Atoms are composed of __________, __________ and __________.

Answer 15

Protons, Neutrons and Electrons

Question 16

What are the four elements that make up 96.3% of the human body?

Answer 16

CHON (carbon, hydrogen, oxygen, and nitrogen)

Question 17

There are 8 elements found in biological organisms in small concentrations, but are still very important. What is the name given to these elements?

Answer 17

Trace elements

Question 18

Name the 8 trace elements.

Answer 18

Sodium, chlorine, calcium, phosphorus, potassium, sulfur, iron and magnesium