Different Families
the family in group 4
what is the carbon family?
Who created the first model of the atom?
John Dalton
How many metals are there so far in the periodic table?
Around 95
the family in group 8
what are noble gases?
Who discovered the atomic model?
Democritus
How many nonmetals are there so far in the periodic table?
Around 17
the family in group 7
what are halogens?
Who created the periodic table?
Mendeelev
How many metalloids are there so far in the periodic table?
Around 6
the family in group 1
what are alkali metals?
Why did the inventor of the periodic table leave empty spaces in the table?
For future and undiscovered elements to be entered.
the amount of periods in the periodic table
What is 7?
the family in columns 3-12
what are transition metals?
What did the inventor of the periodic table organize elements by?
Increasing Atomic Number
the number of families on the periodic table
What is 8?