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THE ATOM

Total questions: 45

Worksheet time: 32mins

Name
Class
Date
1.

___________ used the term 'atomos" meaning indivisible or uncuttable?

a)

John Dalton

b)

Democritus

c)

Ernest Rutherford

d)

J. J. Thomson

2.

What are the basic building blocks of all matter?

a)

Elements

b)

Isotopes

c)

Atoms

d)

Cells

3.

Which particles are the smallest units of a chemical element?

a)

Molecules

b)

Compounds

c)

Atoms

d)

Cells

4.

Which of these determines the identity of an atom?

a)

proton

b)

neutron

c)

valence electron

d)

protons and neutrons

5.

Which of these determines the reactivity of an atom?

a)

proton

b)

neutron

c)

electron

d)

protons and neutrons

6.

Which of these is found in the cloud surrounding nucleus?

a)

proton

b)

neutron

c)

electron

d)

protons and neutrons

7.

Which of these IS found in the nucleus?

a)

protons and electrons

b)

neutron

c)

electrons and neutrons

d)

protons and neutrons

8.

Which of these has a positive charge?

a)

proton

b)

neutron

c)

electron

d)

protons and neutrons

9.

Which of these has a negative charge?

a)

proton

b)

neutron

c)

electron

d)

protons and neutrons

10.

Which of these has a no charge?

a)

proton

b)

neutron

c)

electron

d)

protons and neutrons

11.

Which of these has the least mass at almost 0 amu?

a)

proton

b)

neutron

c)

electron

d)

protons and neutrons

12.

Protons and neutrons are found in the nucleus; therefore the nucleus of the atom would have what overall charge?

a)

positive

b)

neutral

c)

negative

d)

depends on the atom

13.

What property determines if an atom is identified as Flourine?

a)

it has 10 neutrons

b)

it has an atomic mass of 19

c)

it has 9 protons

d)

Its element symbol is Fl.

14.

Which element is shown in the Bohr model?

a)

Helium because it has 2 valence electrons

b)

Magnesium because it has an atomic number of 12.

c)

Chromium because is has an atomic mass of 24.

d)

Argon because it has 18 total subatomic particles.

15.

An element has 5 protons, 6 neutrons, and 5 electrons. What is the charge of the nucleus?

a)

+5

b)

+6

c)

+11

d)

-5

16.

This model shows which element?

a)

Oxygen

b)

Radium

c)

Barium

d)

Cannot be determined

17.

What is the importance of valence electrons?

a)

They determine an atom's identity

b)

They determine whether an atom is a solid, liquid, or gas

c)

They determine whether an atom is a metal, nonmetal, or metalloid

d)

They determine how an atom will react (bond) with other atoms.

18.

Which model of the atom does the picture represent

a)

Dalton's atomic model

b)

Rutherford's nuclear model

c)

Thomson's "plum pudding" model

d)

Bohr's Planetary model

19.

Which model of the atom does the picture represent

a)

Dalton's atomic model

b)

Rutherford's nuclear model

c)

Thomson's "plum pudding" model

d)

Bohr's Atomic model

20.

Rutherford experimented with gold foil and alpha particles to prove that there was a _____________ in an atom.

a)

nucleus

b)

protons

c)

electrons

d)

electron cloud

21.
Which scientist saw the atom as a solid sphere?
a)
Dalton
b)
Thomson
c)
Rutherford
d)
Bohr
22.

Which of the following shows the correct order of Atomic Theory Timeline

a)

Schrodinger, Rutherford, Bohr, Dalton, Democritus, Thomson

b)

Bohr, Democritus, Schrodinger, Thomson, Rutherford, Dalton

c)

Dalton, Thomson, Schrodinger, Rutherford, Bohr, Democritus

d)

Democritus, Dalton, Thomson, Rutherford, Bohr, Schrodinger

23.

Where is most of the atoms mass found?

a)

in the nucleus

b)

in the electron cloud

24.

How many neutrons are in one atom of Lithium?

a)

3

b)

6

c)

4

d)

6.941

25.

Which subatomic particle does the YELLOW(-) circle represent?

a)

proton

b)

neutron

c)

electron

d)

nucleus

26.
The nucleus of an atom is    charged.
a)
positively (+)
b)
negatively (-)
c)
variable
d)
not
27.
Each energy level of an atom has a maximum number of   ____ it can hold
a)
neutrons
b)
protons
c)
quarks
d)
electrons
28.
           Atoms of the same element with different numbers of neutrons are called   .
a)
metalloids
b)
radioactive
c)
transition elements
d)
isotopes
29.
A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is ____.
a)
26
b)
30
c)
52
d)
56
30.

How many electrons does Copper (Cu) have?

a)

29

b)

64

c)

35

d)

58

31.

How many neutrons are in potassium?

a)

39

b)

19

c)

20

d)

58

32.
In terms of matter, the atom is almost entirely filled with _____
a)
orbiting electrons
b)
charged protons
c)
heavy neutrons
d)
empty space
33.

Place the following atomic models in order, from earliest to latest:


A) Rutherford B) Thomson C) Dalton

a)

B, C, A

b)

C, A, B

c)

A, C, B

d)

C, B, A

34.

Which scientist proposed a new atomic model after discovering the electron in 1897?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

35.

The first modern atomic theory was proposed by

a)

Ariostotle

b)

Dalton

c)

Rutherford

d)

Thompson

36.

Which scientist said that atoms of the same element are identical?

a)

Rutherford

b)

Dalton

c)

Democritus

d)

Aristotle

37.

How do you calculate number of neutrons?

a)

Mass number - atomic number

b)

Mass number + atomic number

c)

Atomic number - mass number

38.

The _______ model was proposed a by Dalton

a)

plum pudding

b)

billiard ball

c)

planetary model

d)

tennis balll

39.

In which of these atom(s) is the number of protons equal to the number of neutrons​ ​

a)

germanium - 72

b)

calcium-20

c)

silicon-28

d)

hydrogen-1

40.

Nickel-59 has how many neutrons?

a)

30

b)

31

c)

32

d)

33

41.

76 protons and 114 neutrons

a)

Osmium-114

b)

Osmium-76

c)

Osmium-190

d)

Osmium-190.23

42.

How do you calculate mass number?

a)

Mass x percent

b)

Protons + Electrons

c)

Protons + Neutrons

d)

Neutrons + Protons + Electrons

43.
Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208.  The average atomic mass of lead is 207.2.  Which isotope of lead is likely to be the most abundant.
a)
204
b)
206
c)
207
d)
208
44.
An atom is electrically neutral when
a)
protons and neutrons are the same
b)
protons and electrons are the same
c)
neutrons and electrons are the same
d)
neutrons balance the protons and electrons
45.

76 protons and 114 neutrons

a)

Osmium-114

b)

Osmium-76

c)

Osmium-190

d)

Osmium-190.23

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