First 20 Elements

Question 1

Hydrogen

Answer 1

Number: 1 Mass: 1.00 Oxidation Number: -1, 1

Question 2

Helium

Answer 2

Number: 2 Mass: 4.00 Oxidation Number: 0

Question 3

Lithium

Answer 3

Number: 3 Mass: 6.94 Oxidation Number: 1

Question 4

Beryllium

Answer 4

Number: 4 Mass: 9.01 Oxidation Number: 1,2

Question 5

Boron

Answer 5

Number: 5 Mass: 10.81 Oxidation Number: -1, -5, 1,2,3

Question 6

Carbon

Answer 6

Number: 6 Mass: 12.01 Oxidation Number: -1, -2,-3,-4,-5,1,2,3,4,5

Question 7

Nitrogen

Answer 7

Number: 7 Mass: 14.01 Oxidation Number: -1,-2,-3,1,2,3,4,5

Question 8

Oxygen

Answer 8

Number: 8 Mass: 16.00 Oxidation Number: -1,-2,1,2

Question 9

Fluorine

Answer 9

Number:9 Mass: 19.00 Oxidation Number: -1

Question 10

Neon

Answer 10

Number 10 Mass: 20.18 Oxidation Number:0

Question 11

Sodium

Answer 11

Number:11 Mass: 23.00 Oxidation Number: -1,1

Question 12

Magnesium

Answer 12

Number:12 Mass: 24.31 Oxidation Number:1,2

Question 13

Aluminum

Answer 13

Number: 13 Mass: 27.00 Oxidation Number: -1,-2,1,2,3

Question 14

Silicon

Answer 14

Number: 14 Mass:28.09 Oxidation Number:-1.-2,-3,-4,1,2,3,4

Question 15

Phosphorus

Answer 15

Number: 15 Mass:30.97 Oxidation Number: -1,-2,-3,1,2,3,4,5

Question 16

Sulfur

Answer 16

Number:16 Mass: 32.06 Oxidation Number:-1,-2,1,2,3,4,5,6

Question 17

Chlorine

Answer 17

Number:17 Mass:35.45 Oxidation Number: -1,1,2,3,4,5,6,7

Question 18

Argon

Answer 18

Number 18: Mass: 39.95 Oxidation Number:0

Question 19

Potassium

Answer 19

Number: 19 Mass: 39.10 Oxidation Number -1,1

Question 20

Calcium

Answer 20

Number:20 Mass: 40.08 Oxidation Number:1,2