Electrons and the Atomic Theory

Question 1

What is a charge?

Answer 1

an electrical property that all protons and electrons have

Question 2

What is something really weird about electrons?

Answer 2

They have wave-like properties

Question 3

How are electrons separated?

Answer 3

Electrons are separated by their energy level in what are called shells

Question 4

What are electron clouds?

Answer 4

The areas where electrons are or will be

Question 5

Which electrons are closer to the nucleus?

Answer 5

Electrons with a smaller energy level

Question 6

Which electrons are farther away from the nucleus?

Answer 6

Electrons with a higher energy level

Question 7

How many electrons can be in an orbital

Answer 7

2

Question 8

Who is given credit for the first imagining of the atoms?

Answer 8

Democritus

Question 9

What does the word “atom” originate from?

Answer 9

The Greek word, indivisible

Question 10

When was the first scientific model of an atom created?

Answer 10

1803 by John Dalton

Question 11

What did Dalton contribute to the atomic theory

Answer 11

The belief that atoms combined in whole number ratios to create the different compounds all substances are made out of (Also that atoms are m=not created or destroyed in chemical reactions.

Question 12

When was the idea of a divisible atom with multiple parts proposed and by whom?

Answer 12

In 1897 by J.J. Thompson

Question 13

What was Dalton’s model of the atom called?

Answer 13

Indivisible particles

Question 14

WHat was Thompson’s model of the atom called?

Answer 14

The plum pudding model

Question 15

What was the plum pudding model’s representation?

Answer 15

The idea that an atom was thousands of positively charged particles with thousands of negatively charged particles embedded inside.

Question 16

WHat is another name for the plum pudding model?

Answer 16

The Watermelon Model

Question 17

What did Thomas contribute to the atomic theory?

Answer 17

The idea that the atom had multiple parts

Question 18

When was the idea of the nucleus proposed?

Answer 18

In 1909 by Ernest Rutherford

Question 19

What did Rutherford contribute to the atomic theory?

Answer 19

The idea that the positive charge in an atom was concentrated in the center instead of whizzing around in a cloud-like formation Thomas had proposed. He also found that electrons buzzed around the nucleus and that most of the atom was empty space

Question 20

When was it proposed that the electrons orbited the nucleus?

Answer 20

In 1913 by Niels Bohr as well as the idea that electron’s energy levels determined how close they were to the nucleus as well as their orbit

Question 21

Who discovered the neutron and when?

Answer 21

In 1932 by James Chadwick

Question 22

What is the current model of the atom called?

Answer 22

The Quantum Model

Question 23

Who experimented and discovered alpha particles?

Answer 23

Ernest Rutherford

Question 24

What is an Alpha particle?

Answer 24

Radioactive particles that go through nuclear decay

Question 25

What do electrons act like opposed to what?

Answer 25

Particles, opposed to waves (Though they do share similar properties)