Challenge B Chemistry: Elements 1-20

Element Name Atomic number and Atomic Mass #1

100

H

Hydrogen 

Atomic #=1

Atomic mass= 1

200

B

Boron

5

11

300

F

Fluorine

9

19

400

Al

Aluminum

13

27

500

Cl

Chlorine

17

35

Element Name Atomic number and Atomic Mass #2

100

He

Helium

2

4

200

C

Carbon

6

12

300

Ne

Neon

10

20

400

Si

Silicon

14

28

500

Ar

Argon

18

40

Element Name Atomic number and Atomic Mass #3

100

Li

Lithium

3

7

200

N 

Nitrogen

7

14

300

Na

Sodium

11

23

400

P

Phosphorus

15

31

500

K

Potassium

19

39

Element Name Atomic number and Atomic Mass #4

100

Be

Beryllium

4

9

200

O

Oxygen 

8

16

300

Mg

Magnesium

12

24

400

S

Sulfur

16

32

500

Ca

Calcium

20

40

Parts of an Atom

100

The number of protons contained in an atom of that element.

What is the atomic number?

200

Approximately the total protons and neutrons in an atom of the element.

What is atomic mass?

300

Particles of matter found in the nucleus of an atom, with a positive electric charge and a mass of 1 amu.

What are protons?

400

Particles of matter found in the nucleus of an atom,  that carry no electric charge and have a mass of 1 amu.

What are Neutrons?

500

Particles of matter with a negative electric charge that orbit around the nucleus and are so small they are considered to have no mass.

What are electrons?