He was known for: his atomic theory
1. All matter consists of tiny particles.
2. Atoms are indestructible and unchangeable.
3. Elements are characterized by the mass of their atoms.
Who is John Dalton?
100
The element that is found in period 4 group 2.
What is calcium/Ca?
100
The number of shells in chromium.
What is 4
100
The family that potassium belongs to.
What is Alkali metals
200
The rounded atomic weight of mercury.
What is 10
200
He discovered electrons
Who is JJ. Tomson
200
The element that is found in period 1 group 1.
What is Hydrogen/H?
200
The number of shells in osmium.
What is 6
200
The family that magnesium belongs to.
What is alkali earth metals
300
The rounded atomic weight bromine.
What is 80
300
He discovered electron orbits
Who is Ernest Rutherford
300
The element that is found in period 6, group 16.
What is polonium/Po?
300
The number of shells in helium.
What is 1?
300
The family that neon belongs to.
What is noble gasses?
400
The rounded atomic weight of boron
What is 11
400
he discovered neutrons
Who is James Chadwick
400
The element that is found in group 8, period 7.
What is Hassium/Hs?
400
The number of shells silicon.
What is 3
400
The family that antimony belongs.
What is metalloids?
500
the rounded atomic weight of Ruthenium
What is 101
500
He called tiny fundamental particles of matter atomas.