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PhySci CH4 - Atomic Theory

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

At about what time did the Atomic theory develop?

a)

1,000 BC

b)

400 BC

c)

400 AD

d)

1400 AD

2.

Which thinker coined the term for atom?

a)

Dalton

b)

Thomson

c)

Bohr

d)

Democritus

3.

Who was the first thinker/scientist to say that different atoms could join to form compounds?

a)

Democritus

b)

Dalton

c)

Thomson

d)

Rutherford

4.

Who was the first thinker/scientist to say that matter is made of atoms?

a)

Democritus

b)

Dalton

c)

Rutherford

d)

Bohr

5.

What thinker/scientist used to a cathode ray tube?

a)

Democritus

b)

Thomson

c)

Rutherford

d)

Bohr

6.

Which scientist said that all atoms of an element are exactly alike?

a)

Democritus

b)

Rutherford

c)

Dalton

d)

Thomson

7.

Which scientist is famous for his Gold-foil experiment...?

a)

Dalton

b)

Bohr

c)

Thomson

d)

Rutherford

8.

Which thinker/scientist discovered the nucleus?

a)

Democritus

b)

Dalton

c)

Thomson

d)

Rutherford

9.

What thinker/scientist found the electron (had evidence)?

a)

Democritus

b)

Dalton

c)

Thomson

d)

Bohr

10.

Which thinker/scientist proved the atom could be split?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

e)

None of the above

11.

Which scientist said electrons orbit the nucleus (like planets to Sun)?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

12.

Which scientist/thinker said that electron location is limited to energy levels?

a)

Dalton

b)

Thomson

c)

Bohr

d)

Thomson

e)

None of the above

13.

Which scientist said that the nucleus had protons and neutrons?

a)

Rutherford

b)

Bohr

c)

Dalton

d)

Thomson

14.

Which scientist said that electrons could not be b/w levels?

a)

Dalton

b)

Thomson

c)

Bohr

d)

Rutherford

15.

Electron actions in their path is ..?

a)

In straight lines

b)

Like waves

c)

Predictable

d)

Smooth and even

16.

Which scientist used a plum-pudding model to show the atom?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

17.

Where is the region you have a high chance to find an electron?

a)

nucleus

b)

In between an energy level

c)

orbital

d)

None of the these

18.

What determines the atoms chemical properties?

a)

valence electrons

b)

location of electrons in their paths

c)

Exact locations of electrons

d)

If a electron is in between energy levels

19.

Which scientist thought that electrons traveled on a set path?

a)

Thomson

b)

Bohr

c)

Dalton

d)

None of these

20.

The number of energy levels that are depends on what?

a)

The exact location of electrons

b)

It's random

c)

The number of electrons

d)

No answer given

21.

Protons are ...?

a)

Positive

b)

Negative

c)

Neutral

d)

None of these

22.

Electrons are...?

a)

Positive

b)

Neutral

c)

Negative

d)

None of these

23.

Who was the first to believe that atoms are divisible?

a)

Democritus

b)

Dalton

c)

Thomson

d)

Rutherford

24.

Why did Democritus name the atom - "atomos"?

a)

Because he believed it could not be cut

b)

Because he believed it could be cut

c)

Because atoms were made of one of the 4 elements of nature

d)

None of these

25.

How many electons can be in the 1st energy level of an atom?

a)

1

b)

2

c)

8

d)

16

e)

None of these

26.

How many types of orbitals are there?

a)

1

b)

2

c)

4

d)

8

27.

which orbital can have a total of 14 electrons

a)

s

b)

p

c)

d

d)

f

28.

Which orbital can hold 2 electrons

a)

s

b)

p

c)

d

d)

f

29.

Which orbital holds 6 total electrons?

a)

s

b)

p

c)

d

d)

f

30.

Which orbital will hold 10 total electrons

a)

s

b)

p

c)

d

d)

f

31.

Atoms will jump between energy levels when they...?

a)

Gain energy

b)

Lose energy

c)

None of these listed

d)

Both Gain and lose energy

32.

What state are electrons in when they change energy levels?

a)

emotional

b)

inter-

c)

excited

d)

Boise

33.

Mass number is the number of protons _____ neutrons.

a)

Plus +

b)

Minus -

c)

Equals =

d)

times *

34.

To find the number of neutrons you need to ______ the Mass # and the atomic #?

a)

Add

b)

subtract

c)

multiply

d)

divide

35.

Elements 1 through ______ occur in nature.

a)

90

b)

91

c)

92

d)

94

36.

Atomic number tells us how many of what exactly?

a)

Neutrons

b)

Protons

c)

Electrons

37.

Avogardro's constant is _______.

a)

6.22 x 1023

b)

6.022 x 1022

c)

6.023 x 1023

d)

6.022 x 1023

38.

Atoms have no electric charge because they.....?

a)

have an equal number of charged and noncharged particles

b)

Have neutrons to balance the nucleus

c)

have an equal number of protons and electrons

d)

have neutrons and protons

39.

The modern atomic theory says it is hard to determine the electron's ......?

a)

color

b)

position

c)

charge

d)

mass

40.

A mole is an SI base unit that describes the....?

a)

mass of a substance

b)

amount of a substance

c)

volume of a substance

d)

electric charge of a substance

41.

Why did Democritus's original atomic theory need revised..?

a)

It claimed matter is made of atoms

b)

It claimed atoms could be diided

c)

it explained what electrons are

d)

It did not have a scientific basis.

42.

Which of these is not part of Dalton's atomic theory...?

a)

Atoms cannot be divided

b)

Atoms of an element are alike

c)

Atoms are made of electrons

d)

Atoms of different elements form compounds

43.

Thomson is responsible for discovering an atoms...?

a)

Electrons

b)

Molecules

c)

Compoundes

d)

Elements

44.

Which statement is untrue?

a)

Neutrons have no charge

b)

Neutrons have a negative charge

c)

Protons have a positive charge

d)

A nucleus has a positive charge

45.

Whose model had a positive charge in the atom's center?

a)

Dalton's

b)

Rutherford's

c)

Thomson's

d)

Bohr's

46.

The overall charge of an atom is...?

a)

Positive

b)

Neutral

c)

Negative

d)

Unbalanced

47.

How many electrons are in the 2nd energy level?

a)

2

b)

8

c)

10

d)

12

48.

How many electrons are in the 3rd energy level?

a)

6

b)

8

c)

18

d)

32

49.

How many electrons are in the 4th energy level?

a)

8

b)

24

c)

32

d)

48

50.

The positive nucleus is _______ by the negative electrons?

a)

balanced

b)

unbalanced

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