Electrons and the Atomic Theory Flashcards Preview

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Flashcards in Electrons and the Atomic Theory Deck (25)
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1
Q

What is a charge?

A

an electrical property that all protons and electrons have

2
Q

What is something really weird about electrons?

A

They have wave-like properties

3
Q

How are electrons separated?

A

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

4
Q

What are electron clouds?

A

The areas where electrons are or will be

5
Q

Which electrons are closer to the nucleus?

A

Electrons with a smaller energy level

6
Q

Which electrons are farther away from the nucleus?

A

Electrons with a higher energy level

7
Q

How many electrons can be in an orbital

A

2

8
Q

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

A

Democritus

9
Q

What does the word “atom” originate from?

A

The Greek word, indivisible

10
Q

When was the first scientific model of an atom created?

A

1803 by John Dalton

11
Q

What did Dalton contribute to the atomic theory

A

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.

12
Q

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

A

In 1897 by J.J. Thompson

13
Q

What was Dalton’s model of the atom called?

A

Indivisible particles

14
Q

WHat was Thompson’s model of the atom called?

A

The plum pudding model

15
Q

What was the plum pudding model’s representation?

A

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

16
Q

WHat is another name for the plum pudding model?

A

The Watermelon Model

17
Q

What did Thomas contribute to the atomic theory?

A

The idea that the atom had multiple parts

18
Q

When was the idea of the nucleus proposed?

A

In 1909 by Ernest Rutherford

19
Q

What did Rutherford contribute to the atomic theory?

A

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

20
Q

When was it proposed that the electrons orbited the nucleus?

A

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

21
Q

Who discovered the neutron and when?

A

In 1932 by James Chadwick

22
Q

What is the current model of the atom called?

A

The Quantum Model

23
Q

Who experimented and discovered alpha particles?

A

Ernest Rutherford

24
Q

What is an Alpha particle?

A

Radioactive particles that go through nuclear decay

25
Q

What do electrons act like opposed to what?

A

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