periodic table elements

Atomic number 1, Group 1, Period 1

• He

• H

• Li

• Na

Atomic number 2, Group 8, Period 1

• He

• H

• Li

• Na

Atomic number 3, Group 1, Period 2

• H

• Li

• Na

• K

Atomic number 4, Group 2, Period 2

• B

• Mg

• Be

• Na

Atomic number 5, Group 3, Period 2

• Be

• C

• N

• B

Atomic number 6, Group 4, Period 2

• Ca

• O

• C

• N

Atomic number 7, group 5, period 2

• Ni

• N

• O

• F

Atomic number 8, Group 6, period 2

• O

• N

• F

• Ne

Atomic number 9, group 7, period 2

• Fl

• F

• Cl

• Ar

atomic number 10, group 8, period 2

• N

• Ar

• Ne

• Cl