Ch 2

Question 1

This chemical causes ______ in marine animals (______)

Answer 1

bioluminescence, aequorin

Question 2

How many elements are essential to life?

Answer 2

25 of the 92

Question 3

Life depends on…

Answer 3

Chemical reactions

Question 4

What elements makes up 96% of living matter?

Answer 4

HCON

Question 5

What elements account for the other 4%?

Answer 5

P, Ca, S, K

Question 6

An element can be broken down into another substance. T or F?

Answer 6

F

Question 7

Atomic #

Answer 7

of protons

Question 8

Atomic #

Answer 8

of protons

Question 9

Atomic mass

Answer 9

Protons + neutrons

Question 10

Outside shell

Answer 10

Valence shell

Question 11

Outside shell

Answer 11

Valence shell

Question 12

All shells participate in chemical rxns

Answer 12

F; only valence shell

Question 13

Cation

Answer 13

Atom with a net positive charge, has more protons than electrons in the valence shell

Question 14

Cation

Answer 14

Atom with a net positive charge, has more protons than electrons in the valence shell

Question 15

Anion

Answer 15

Atom with net negative charge, more electrons in valence than protons

Question 16

Octet Rule

Question 17

Valence shell of HONC

Question 18

The number of electrons needed is equal to….

Question 19

Covalent bonds

Answer 19

Electrons shared

Question 20

Polar vs nonpolar

Question 21

In polar covalent bonds one atom is more _____ and ____ aren’t equally shared

Question 22

Partial charge

Question 23

Partial charge

Question 24

Electronegativity

Question 25

Electronegativity

Question 26

H Bonds

Question 27

Isotopes

Question 28

Isotopes