Scientists
Elements
Electron configuration
Valence Electrons
Trends
100

Which scientists built the cathode ray

J.J. Thompson

100

How many protons does chlorine have?

17

100

What is the electron configuration of helium?

1s^2

100

Which element does chlorine have to combine with to become a noble gas

Na

100

Which direction does the metallicity go horizontal wise

Right to left

200

Which scientists came up with idea of atoms

Dalton

200

How many protons does aluminum have

13

200

What is the electron configuration of iron

1s^2 2s^2 3s^2 3p^6 4s^2 3d^6

200

What element does Selenium have to combine with to become a noble gas

Calcium 

200

Which direction does the atomic radius go virtually 

Up to down

300

Which scientists discovered the nucleus?

Rutherford

300

Which element has 76 protons with a charge of positive two?

Os

300

Electron configuration of sodium 

1s^2 2s^2 2p^6 3s^1

300

What element does silver have to combine with to become a noble gas?

Mo

300

If a question is referring to weight it is referring to what category 

Atomic radius

400

Which experiment led to discovery of the nucleus

Gold Foil

400

Which element has 49 protons with a charge of negative 5?

In

400

What element is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^5

Br

400

What element would S have to combine with to be a noble gas

Mg

400

In group 14, which has the most electronegativity

C

500

Which scientists contested electrons were on specific energy rings

Heisenberg

500

Which element has 62 protons with a charge of positive 70

Sm

500

What is the noble gas configuration of Ba

Xe 6s^2

500

What element would As have to combine with to be a noble gas

Ga

500

In the fourth level of energy, which is the most metallic

K