Chapeter 2

Question 1

Both living and non living organisms are composed of what?

Answer 1

Matter

Question 2

Matter consist of what?

Answer 2

Elements

Question 3

What are the most significant elements in organisms?

Answer 3

Carbon
Hydrogen 
Nitrogen
Oxygen
Phosphorus 
Sulfur

Question 4

Elements contain what?

Answer 4

Atoms

Question 5

Atoms are composed of what?

Answer 5

Subatomic particles protons and neurons

Question 6

What does the atomic number tell you?

Answer 6

The number of protons and electrons

Question 7

Isotopes differ in their??

Answer 7

Number of neutrons

Question 8

The periodic table provides us with what?

Answer 8

The atomic number,symbol, and mass
How many shells an atom has
How many elections are in the outer shell

Question 9

When an atom gains electrons it?

Answer 9

Forms a negatively charged ion

Question 10

What does polar covalent bond mean?

Answer 10

An unequal sharing of electrons

Question 11

Hydrogen bonds are formed as a result of what?

Answer 11

A charged part of a molecule having polar covalent bonds forms a electrostatic interaction of the opposite charge

Question 12

Water is a solvent for what?

Answer 12

Molecules

Question 13

Water is _________ and _________?

Answer 13

Cohesive and adhesive

Question 14

What are the characteristics of carbon?

Answer 14

• Forms four covalent bonds
• Bonds with other carbon atoms
• Can form long chains
• Sometimes shares two pairs of electrons with another atom

Question 15

What are monomers ?

Answer 15

A molecule that can be bonded to another identical molecule.

Question 16

What is a polymer?

Answer 16

Is a molecule made from joining together many smaller Molecules.

Question 17

What are the monomers of carbohydrates?

Answer 17

Monosaccharides

Question 18

________ is a polysaccharides is used as an energy storage molecule for plants ?

Answer 18

Starch

Question 19

Fructose and galactose are both isomers of ?

Answer 19

Glucose