LCA Atomic History

Question 1

How many electrons are in the 2nd level of Bohr’s Atomic Model?

Accepted Answer

8

Question 2

Whose theory stated “Atoms combine to form compounds in whole number ratios?

Accepted Answer

John Dalton

Question 3

Where did Niels Bohr say electrons were in an atom?

Accepted Answer

Energy levels

Question 4

How many moles of Gallium are in 300 grams of Ga?

Accepted Answer

4.3 moles

Question 5

How many electrons are represented in this picture?

Accepted Answer

10

Question 6

Which neutral element should have the most neutrons?

Accepted Answer

Tl - Thallium

Question 7

Which particle is most common inside an atom?

Accepted Answer

Depends

Question 8

Who discovered electrons have a negative charge?

Accepted Answer

JJ Thompson

Question 9

What is useful about the Plum-Pudding model?

Accepted Answer

Common analogy

Question 10

What makes one isotope different from another?

Accepted Answer

# of Neutrons

Question 11

What is a mole’s favorite breakfast?

Accepted Answer

Insects

Question 12

What did Bohr observe that helped him figure out what electrons were doing?

Accepted Answer

Light from excited Hydrogen gas

Question 13

Who calculated the exact charge of an electron?

Accepted Answer

Robert Millikan

Question 14

How many protons & electrons are in a neutral Br atom?

Accepted Answer

35, 35

Question 15

How many grams does 3 moles of Fluorine have?

Accepted Answer

about 57 grams

Question 16

What tool did JJ use to find an electron's charge?

Accepted Answer

Cathode Ray Tube

Question 17

How many electrons are represented in this picture?

Accepted Answer

1

Question 18

How many neutrons are represented in this picture?

Accepted Answer

5

Question 19

Which neutral element has more electrons?

Accepted Answer

W - Tungsten

Question 20

What is the difference between 2 isotopes of Cobalt?

Accepted Answer

# of neutrons

Question 21

If I have 4 moles of Fe-Iron in a container, how many grams is it holding?

Accepted Answer

223.4 g Fe

Question 22

What experiment did Millikan set-up to find an electron's exact charge?

Accepted Answer

Oil Drop

Questions 22