Ch 2

Question 1

Nitrogen

Answer 1

N

Question 2

Oxygen

Answer 2

O

Question 3

Hydrogen

Answer 3

H

Question 4

Sodium

Answer 4

Na

Question 5

Phosphorus

Answer 5

P

Question 6

Chlorine

Answer 6

Cl

Question 7

Calcium

Answer 7

Ca

Question 8

Potassium

Answer 8

K

Question 9

Atomic symbol

Answer 9

Letter abbreviation

Question 10

How many elements/atoms are there?

Answer 10

118

Question 11

Atomic structure

Answer 11

3 types of subatomic particles:
Protons
Neutrons
Electrons

Question 12

What subatomic particles are found in the nucleus?

Answer 12

Protons

Neutrons

Question 13

What subatomic particles are found outside the nucleus?

Answer 13

Electrons

They are found in shells, rings, orbitals around the nucleus.

Question 14

Protons charge?

Answer 14

Positive

Question 15

Neutron charge?

Answer 15

No charge

Nuetral

Question 16

Electron charge?

Answer 16

Negative

Question 17

Atomic Number

Answer 17

Number of protons in an atom

Question 18

Atomic weight/mass

Answer 18

Average mass of an elements atoms.
Total number of protons and neutrons in the nucleus.
Every element will have variations

Question 19

Carbon

Answer 19

C

Question 20

C12-carbon 12

Answer 20

6 protons
6 neutrons
12

Question 21

Carbon 13

Answer 21

6 protons
7 neutrons
13

Question 22

Carbon 14

Answer 22

6 P
8 N
14

Question 23

Isotopes

Answer 23

Variation in the number of neutrons in the nucleus

Atomic mass=average weights of an elements isotopes

Question 24

Radioactive isotopes

Answer 24

Unstable
Radioactive-spontaneously emit subatomic particles or radiation in measurable amounts
Weak radioactive isotopes are sometimes used in diagnostic procedures

Question 25

Half-life

Answer 25

Time it takes half of the element to decay.