Chapter 2: Chemistry Of Life

Question 0

Neutrons

Answer 0

Are found in the nucleus and are neutral

Question 1

Electrons

Answer 1

Have a negative charge and orbits around the atom

Question 2

Protons

Answer 2

Are found in the nucleus and are positive

Question 3

Covalent bonds

Answer 3

When atoms are SHARED

Question 4

Ionic bonds

Answer 4

When atoms are TRANSFERRED

Question 5

Numbers of electrons in the first she’ll second and third

Answer 5

First=2
Second=8
Third=8

Question 6

Catalyst

Answer 6

Speeds up a chemical reaction

Question 7

Enzymes

Answer 7

Proteins that speed up reactions in cells

Question 8

Activation energy

Answer 8

The energy needed to start a chemical reaction

Question 9

Acid

Answer 9

Have higher concentration of hydrogen plus ions. Has a ph lower than 7

Question 10

Base or alkaline

Answer 10

Have lower numbers of hydrogen plus ions. Are above 7 in the ph scale

Question 11

Organic compounds

Answer 11

Compounds that contain carbon

Question 12

Buffers

Answer 12

Weak acids or based that react with strong ones to prevent sudden changes in ph

Question 13

Elements found in life

Answer 13

Carbon dioxide , hydrogen, oxygen, nitrogen

Question 14

Properties of water

Answer 14

Absorbs heat, ice floats, good solvent, bonds are weak and can be rearranged

Question 15

Hydrogen bonding

Answer 15

The positive and negative ions attract each other to form an ionic bond

Question 16

Polarity of water

Answer 16

Some ions are particle and some are negative