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Atomic Theory and Structure

Total questions: 46

Worksheet time: 48mins

Name
Class
Date
1.

The massive, neutral subatomic particle

a)

proton

b)

neutron

c)

electron

2.

tiny, negatively charged subatomic particle

a)

proton

b)

neutron

c)

electron

3.

The massive, positive subatomic particle

a)

proton

b)

neutron

c)

electron

4.

Which element has an atomic number of 63?

(a)  

5.

Which element has the atomic number 17?

(a)  

6.

What is the atomic number of bromine?

a)

Br

b)

35

c)

79.904

d)

45

7.

Which element has 78 protons?

(a)  

8.

What element has 41 protons and 41 electrons?

(a)  

9.

Which have no electrical charge?

a)

protons

b)

neutrons

c)

electrons

10.

Reorder the following from earliest discovery to the most recent.

a)

atomos

b)

whole number ratios

c)

electrons

d)

protons

e)

neutrons

1)
2)
3)
4)
5)
11.

Reorder the following from earliest to most recent.

a)

Sphere Model

b)

Chocolate Chip (plum pudding) Model

c)

Planetary Model

d)

Bohr Model

e)

Quantum Mechanical Model

1)
2)
3)
4)
5)
12.

Reorder the following from earliest to most recent.

a)

Dalton

b)

Thomas

c)

Rutherford

d)

Chadwick

e)

Schrodinger

1)
2)
3)
4)
5)
13.

Match the following

a)

Thompson

1.

electron

b)

Rutherford

2.

proton

c)

Chadwick

3.

neutron

d)

Shrodinger

4.

wave equation

e)

Lavoisier

5.

Father of Chemistry

14.

Match the following

a)
1.

Thompson

b)
2.

Rutherford

c)
3.

Bohr

&

Chadwick

d)
4.

Einstein, Schrodinger, &Heisenberg

e)
5.

Dalton

15.

Gallium occurs in nature in two isotopes: Ga-69 (68.926 amu; 60.108%) and Ga-71 (70.925; 39.892%). Calculate the atomic mass of gallium. Round you answer off to 3 decimal places

(a)  

16.

Draw the symbol isotopic symbol for carbon-12. Include the symbol, the Atomic Number, Isotopic Mass, and charge (if necessary)

17.

Draw the symbol for oxygen-17. Include the symbol, the Atomic Number, Isotopic Mass, and charge (if necessary)

18.

Match the following

a)

different numbers of neutrons

1.

isotopes

b)

different numbers of electrons

2.

ions

c)

different numbers of protons

3.

different elements

19.

Which part of the atomic theory did Niels Bohr prove?

a)

there are electrons

b)

there is a nucleus

c)

electrons are in energy levels

d)

gold foil experiment

20.

John Dalton wrote postulates to make the idea of the atom useful. Which postulate below was proven wrong?

a)

All elements are made up of tiny indivisible particles called atoms.

b)

The atoms of one element are different from the atoms of another element.

c)

Atoms of different elements chemically combine to form chemical compounds.

d)

During chemical reactions, atoms are rearranged.

21.

Which statement is incorrect?

a)

The nucleus is very dense.

b)

The nucleus contains protons and neutrons.

c)

The nucleus is positively charged.

d)

The nucleus is involved in chemical reactions.

22.

The number of protons is equal to the number of electrons for an atom. This means an atom is-

a)

electrically neutral

b)

electrically positive

c)

electrically negative

23.

What determines chemical reactivity?

a)

protons

b)

neutrons

c)

electrons

d)

isotopes

24.

What determines the identity of the atom?

a)

protons

b)

neutrons

c)

electrons

d)

isotopes

25.

When an atom loses or gains electrons to become more stable it becomes an:

a)

ion

b)

isotope

c)

atom

d)

average

26.

What are atoms with the same number of protons but different numbers of neutrons?

a)

electrons

b)

protons

c)

neutrons

d)

isotopes

27.

After Rutherford discovered the nucleus, which model is believed to be true?

a)

protons, neutrons, and electrons are evenly distributed

b)

the nucleus is made of protons, neutrons, and electrons

c)

the nucleus is made of protons and electrons

d)

the model is mostly empty space with a central nucleus

28.

Which particles form the nucleus of the atom?

a)

protons and electrons

b)

protons and neutrons

c)

electrons and ions

d)

electrons and neutrons

29.

Look at this picture of Argon off the periodic table. Which of the following is true for this element?

a)

18 protons

b)

40 protons

c)

22 protons

d)

21.9 protons

30.
The mass of this particle is so small that it is not counted.
a)
proton
b)
electron
c)
neutron
d)
quark
31.
All atoms of a particular element have the same number of these
a)
electrons
b)
neutrons
c)
protons
32.
Which of these phrases best describes an atom?
a)
a positive nucleus surrounded by a hard negative shell
b)
a positive nucleus surrounded by a cloud of negative charges
c)
a hard sphere with postive and negative charges on the outside
d)
a negative nucleus surrounded by protons and neutrons
33.
What is the name of this element?
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
34.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
35.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
36.

If Q is the symbol for an element, which two of the following symbols represent isotopes of the same element? Choose two answers!

a)
b)
c)
d)
37.

Write the symbol of the unknown isotope.

(a)  

38.

What kind of bond forms between metals and non-metals?

a)

ionic

b)

covalent

39.

What kind of bond forms between 2 non-metals?

a)

ionic

b)

covalent

40.
What is an ion?
a)
A Charged Atom
b)
A Large Atom
c)
A Small Atom
d)
A Cute Atom
41.
Why are ions formed?
a)
To make our lives difficult
b)
Because atoms want 8 valence electrons
c)
Because atoms have the same number of protons and electrons
d)
Because atoms gained neutrons
42.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
43.
Mg+2 is...
a)
an isotope
b)
a cation
c)
an anion
d)
a neutral atom
44.
How many total electrons does O-2 (an oxide ion) have?
a)
8
b)
10
c)
6
d)
18
45.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
46.

Match the following

a)

gain electrons

1.

anions

b)

lose electrons

2.

cations

c)

cations are

3.

positively charged

d)

anions are

4.

negatively charged

e)

atoms are

5.

neutral

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