Criteria Periodic Elements

Element on the periodic table
Can be found in nature
First observed on earth
Discovered before 1900
Atomic number is lower than 75
Has a single-letter symbol
Is a non-metal
Is one of the diatomic elements
Has two electron shells
Makes up more than 10% of the atmosphere
Discovered by Daniel Rutherford

Element on the periodic table
Can be found in nature
First observed on earth
Discovered before 1900
Atomic number is lower than 75
Has a single-letter symbol
Is a non-metal
Is one of the diatomic elements
Has two electron shells
Makes up more than 10% of the atmosphere

Element on the periodic table
Can be found in nature
First observed on earth
Discovered before 1900
Atomic number is lower than 75
Has a single-letter symbol
Is a non-metal
Is one of the diatomic elements
Has two electron shells

Element on the periodic table
Can be found in nature
First observed on earth
Discovered before 1900
Atomic number is lower than 75
Has a single-letter symbol
Is a non-metal
Is one of the diatomic elements

Element on the periodic table
Can be found in nature
First observed on earth
Discovered before 1900
Atomic number is lower than 75
Has a single-letter symbol
Is a non-metal

Element on the periodic table
Can be found in nature
First observed on earth
Discovered before 1900
Atomic number is lower than 75
Has a single-letter symbol

Element on the periodic table
Can be found in nature
First observed on earth
Discovered before 1900
Atomic number is lower than 75

Element on the periodic table
Can be found in nature
First observed on earth
Discovered before 1900

Element on the periodic table
Can be found in nature
First observed on earth

Element on the periodic table
Can be found in nature

Element on the periodic table