Periodic Table & Atomic Structure

Question 1

Who organized the elements by increasing atomic number?

Accepted Answer

Moseley

Question 2

How many protons does Hydrogen have?

Accepted Answer

1

Question 3

Atomic mass of Sulfur?

Accepted Answer

32

Question 4

The cathode ray tube experiment led to which particle being discovered?

Accepted Answer

Electron

Question 5

What is the atomic number of Oxygen?

Accepted Answer

8

Question 6

Where are metalloids located on the periodic table?

Accepted Answer

on the stairstep

Question 7

The protons in Rutherford's experiments were used to- ?

Accepted Answer

Bombard sheets of gold

Question 8

Which of the following showed electrons in specific, fixed orbits?

Accepted Answer

Bohr model

Question 9

An unknown element has 26 protons, 26 electrons, and 30 neutrons. Name the element.

Accepted Answer

Iron

Question 10

Who discovered the nucleus?

Accepted Answer

Rutherford

Question 11

Who created the billiard ball model?

Accepted Answer

Dalton

Question 12

Who organized the elements by increasing atomic mass?

Accepted Answer

Mendeleev

Question 13

Rank the following elements by increasing atomic radius: Carbon, Aluminum, Oxygen, Potassium.

Accepted Answer

O, C, Al, K

Question 14

Number of protons in Magnesium?

Accepted Answer

12

Question 15

Who discovered energy levels?

Accepted Answer

Bohr

Question 16

How many electrons does neon have?

Accepted Answer

10

Question 17

How many neutrons does Sulfur have?

Accepted Answer

16

Question 18

Number of electrons in Potassium?

Accepted Answer

19

Question 19

Who did the gold foil experiment?

Accepted Answer

Rutherford

Question 20

Who created the plum pudding model?

Accepted Answer

Thomson

Questions 20