structure
history
Periodic table
Name the element
random
100

Where are protons located 

Nucleus 

100

What model was introduced in 1913

The Bohr model or Rutherford-Bohr model 

100

The most reactive metal 

Francium 

100

H

hydrogen 

100

He

Helium

200

Where are electrons located 

Electron cloud 

200

what model was introduced in 1911

Rutherford model which is also known as Rutherford atomic model 

200

The most reactive nonmetal 

Fluorine 

200

Li

Lithium 

200

The 4th element 

Beryllium 

300

Where are neutrons located

Nucleus

300

When was the atom found 

Around 450 B.C

300

Least reactive nonmetal 

Helium 

300

Mg

Magnesium 

300

Metalloid in group 13

Boron 

400

Where is the nucleus 

The center of an atom

400

Who discovered the atom

Democritus

400

Least reactive metal 

Lithium 

400

Pb

Lead

400

Has the mass of 14.007

Nitrogen 

500

Where is the electron cloud located 

The area around the nucleus 

500

Who re introduced the atom 

John Dalton 

500

The first element 

Hydrogen 

500

Fe

Iron

500

What is the name of J.J Thompsons model 

The plum pudding model 

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