H
Hydrogen
who said "there is a small, dense, positively charged nucleus
Rutherford
Beryllium (Be)
4
what group column is He, Ne, Ar, Kr, Xe, Rn and Og
18 or Nobel Gases
Beryllium (Be)
9.01
Ca
Calcium
who said "Atoms" means "not to be cut" which refers to the smallest piece of matter.
Democritus
Helium (He)
2
what group column is Li, Na, K, Rb, Cs, Fr
Lithium (Li)
6.94
Hf
Hafnium
who said "Matter has four properties: hot, cold, dry and wet.
Aristotle
Calcium (Ca)
20
what group column is Be, Mg, Ca, Sr, Ba, Ra
Alkaline Earth Metals
Helium (He)
4.00
Ra
Radium
who said "Atoms are uncuttable"
Dalton
57
what two elemnts is the group called for at least one of them Te, Po
Metalloids
Boron (B)
10.8
Fe
Iron
who said "Electrons move around the nucleus billions of times in one second"
Schrodinger, Heisenberg, Einstein AND/OR other scientists
Nihonium (Nh)
113
what three elements is the group called O, S, Se
Non-Metals
Titanium (Ti)
47.8