Chemistry Quiz

Question 0

What percent of elements are essential in loving things?

Answer 0

25%

Question 1

What is an element

Answer 1

A substance that cannot be broken down

Question 2

What elements make up 96% of the human body?

Answer 2

Carbon, nitrogen, hydrogen, and oxygen

Question 3

What are the 3 basic subatomic particles

Answer 3

Neutrons-no charge, neutral, in the nucleus, n^0
Protons-positive, found in the nucleus p^+
Electrons-negative, found in energy levels e^-

Question 4

Each energy level can…

Answer 4

Hold a specific number of electrons
1-2
2-8
3-18

Question 5

Atoms contain _________. Therefore, they have _________.

Answer 5

Equal numbers of protons and electrons;no overall net charge

Question 6

Atoms can have ______ and therefore have ________.

Answer 6

Different numbers of neutrons;different atomic mass

Question 7

Atoms of the same element with different numbers of neutrons are called _______.

Answer 7

Isotopes

Question 8

The properties of elements are determined by _______.

Answer 8

The structures of their atoms

Question 9

What does an acid form in water? What does a base form in water?

Answer 9

Acid-hydrogen ions

Base-hydroxide ions

Question 10

Why are carbon molecules called organic?

Answer 10

Because they are found in all living things

Question 11

What kind of ratio does a carbohydrate have?

Answer 11

A 1:2:1 ratio

Question 12

What kind of ratio does a lipid have?

Answer 12

Large number of carbon:large carbon of hydrogen:small number of oxygen

Question 13

What is another name for dehydration and what is it?

Answer 13

Condensation synthesis. It is when a protein is being made. A water molecule is lost and a protein is formed

Question 14

What is hydrolysis

Answer 14

Adding a molecule of water to break apart a protein

Question 15

What can carbohydrates exist as?

Answer 15

Isomers: molecules with the same number of atoms for each element but the atoms are arranged differently.

Question 16

Characteristics of monosaccharides

Answer 16

Simple sugar. Short term energy. Glucose, fructose, galactose.

Question 17

Characteristics of polysaccharides

Answer 17

Complex sugars. Short term energy. Starches, cellulose, glycogen.

Question 18

Enzymes are special kinds of ____.

Answer 18

Proteins.

Question 19

What are the monomers of carbohydrates, lipids, proteins, and nucleic acids.

Answer 19

Carbs-monosaccharides. Lipids-triglycerides. Proteins-amino acids. Nucleic acids-nucleotides.

Question 20

What is another name for carbon compounds

Answer 20

Organic compounds

Question 21

What are the six most common elements in organic molecules?

Answer 21

Carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur

Question 22

Why aren’t unsaturated fats solid at room temperatures

Answer 22

Because of the double bonds present between carbons.

Question 23

What are some general characteristics of proteins?

Answer 23

Polymers of amino acids. Unique 3D shape. Provide support, make up various enzymes, antibodies.

Question 24

What are some general characteristics of lipids?

Answer 24

Not soluble in water. Mostly of hydrocarbon chains. 3 categories: fats, steroids, or phospholipids.

Question 25

Characteristics of saturated fats

Answer 25

Straight chain. No carbon double bond with carbon. Tight packing. Solid at room temperatures. From animals.

Question 26

Characteristics of unsaturated fats

Answer 26

Bent chain. At least one carbon double bonded to carbon. Not right packing. Liquid at room temperature. From plants.