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Chapter 12

Total questions: 58

Worksheet time: 1hrs 9mins

Name
Class
Date
1.

Which scientist described a positively charged core (“nucleus”) in the middle of a lot of empty space?

a)

Chadwick

b)

Thomson

c)

Rutherford

d)

Bohr

2.
This model this model was the first to show a nucleus, consisting of protons and neutron.  Electrons surround the nucleus but are not shown in distinct energy levels. 
a)
The "Rutherford Model" of the atom
b)
The "Plum Pudding Model" of the atom
c)
The "Quantum Mechanical Modell" of the atom
d)
Democritus's model of the atom
3.
Ernest Rutherford discovered that atoms were mostly _________________. 
a)
negatively charged
b)
positively charged
c)
electrons
d)
empty space. 
4.
In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil, but some were deflected or bounced back.  What did we conclude because of this?  
a)
Atoms are small indivisible spheres
b)
Atoms are mostly empty space with a small, dense, positive center
c)
Atoms have negatively charged particles which orbit the nucleus
d)
Light is a wave, not a particle
5.

How many neutrons would you expect the average gold atom to have given the information shown?

a)

79

b)

118

c)

197

d)

276

6.

Who established that "electrons move around the nucleus at fixed distances called orbitals"?

a)

Dalton

b)

Thomson

c)

Rutherford

d)

Bohr

7.

Who was Ernset Rutherford?

a)

English Science teacher who developed the first Atomic Theory

b)

English physicist who discovered an electron

c)

German physicist who discovered a proton

d)

New Zealand born physicist who established existence of a positively charged nucleus in an atom

8.

What is an alpha particle?

a)

It is a dominant particle in a subatomic world

b)

It is a particle that has 2+ charge

c)

It is a particle that has 2- charge

d)

It is a helium atom without a charge

9.

What results did Rutherford observe in his Gold-Foil experiment?

a)

He observed that all alpha particles did go through a gold-foil in straight lines

b)

He observed that most alpha particles did not go through a gold-foil and stopped on one side of the gold foil.

c)

He observed that a small number of alpha particles bounced off the gold-foil at very large angles

d)

He observed that all alpha particles slightly deflected from the straight line when going through a gold-foil

10.

What subatomic particles are in the nucleus of an atom?

a)

Only protons

b)

Protons and neutrons

c)

Only neutrons

d)

Only electrons

e)

Protons and electrons

11.
How many electrons does potassium K contain? 
a)
19
b)
39
c)
20
d)
40
12.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
13.
Carbon-12 has 6 protons and 6 neutrons. How many electrons will orbit the nucleus?
a)
12
b)
6
c)
3
d)
18
14.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
15.

If an element has an atomic number of 23 and an atomic mass of 50.89, how many neutrons must it have in it's nucleus?

a)

38

b)

28

c)

17

d)

29

16.

On the periodic table, Groups are

a)

Horizontal rows

b)

Vertical columns

17.

On the periodic table, Periods are

a)

Horizontal rows

b)

Vertical columns

18.

The innermost energy level has a maximum of how many electrons?

a)

1

b)

2

c)

6

d)

8

19.

What does the Bohr Model represent?

a)

The structure of molecules

b)

The structure of the Solar System

c)

The structure of an atom

d)

The structure of East Hills

20.

Elements in Group number 17 are known as

a)

Alkai Metals

b)

Alkaline Metals

c)

Halogens

d)

Noble Gases

21.

Which group includes non-reactive gasses that have a full outer electron shell?

a)

Alkai Metals

b)

Alkaline Metals

c)

Halogens

d)

Noble Gases

22.

Which group includes soft, highly reactive metals with one electron in their outer shell?

a)

Alkai metals (group 1)

b)

Alkaline metals (group 2)

c)

Halogens (group 17)

d)

Noble gasses (group 18)

23.
How did Mendeleev arrange the elements?
a)
alphabetical 
b)
density
c)
melting point
d)
atomic mass
24.
The number at the bottom of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
chemical symbol
d)
element name
25.
The number at the top of each square on the periodic table is the ...
a)
atomic number
b)
atomic mass
c)
Chemical Symbol
d)
Element Name
26.
The months of the year are __________ because they repeat in the same order every 12 months.
a)
periodic
b)
group
c)
period
d)
halogens
27.
Pure forms of these elements are stored in oil so they won't react with oxygen and water in the air.
a)
Alkali Metals
b)
Alkaline-earth metals
c)
Halogens
d)
Noble Gases
28.
All of the actinides are ___________.
a)
stable
b)
radioactive
c)
shiny
d)
named after scientists
29.
Most of the elements on the periodic table are classified as _____.
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Periods
30.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
31.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
32.
a)
Metals
b)
Nonmetals
c)
Metalloids
33.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

34.
The atomic number of this pictured element is
a)
28
b)
58.6934
c)
Ni
d)
Nickel
35.
These are found on the Periodic Table.
a)
Compounds
b)
Elements
c)
Mixtures
36.

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

a)

element

b)

subatomic particle

c)

electron

d)

matter

37.

one of several forms of a single element, which contains the same number of protons, but different numbers of neutrons

a)

isotope

b)

ion

c)

orbital

d)

nucleus

38.

an atom or group of atoms that has gained or lost one or more electrons and is now either positively or negatively charged

a)

isotope

b)

ion

c)

orbital

d)

nucleus

39.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
40.

Which are the Alkaline earth metals?

a)

calcium, magnesium, Beryrillium, Strontium, Barium, Radium

b)

Lithium, Sodium Potassium, Ribidium, Cesium, Francium

c)

Nitrogen, Phosphorous, Arsenic, Bismuth

d)

Helium, Neon, Argon, Krypton, Rado, Xenon

41.

Transition metals generally have higher densities and strength than alkali metals

a)

True

b)

False

c)

Who knows that?

42.
Where are the transition metals found on the periodic table?
a)
The first 5 elements
b)
The bottom two rows
c)
Group 3-12
d)
Row 3-12
43.
When iron fillings are mixed with sand, the iron can be removed using a magnet.  This is evidence that the change that occured when the two were mixed was
a)
physical
b)
chemical
c)
irreversible
d)
molecular
44.

Which of the following are properties of transition metals?

a)

They are excellent conductors of electricity and heat

b)

They are malleable and ductile.

c)

They have high boiling points.

d)

All of the above.

45.

Copper can be shaped into wires because it is _______

a)

ductile

b)

playable

c)

soluble

d)

corrosive

46.

Transition metals include the only elements that can produce a

a)

transition

b)

compound

c)

ion

d)

magnetic field

47.

What is the mean of the "halogens"?

a)

acid former

b)

salt former

c)

alkali former

d)

non metal former

48.

Where are the"Halogens" located in periodic table?

a)

In 1A group

b)

In 2A group

c)

In 7A group

d)

In 8A group

49.

Gases that exhibit stability and low reaction rates are called ______________

a)

Halogen gases

b)

Noble gases

c)

Boron gases

d)

Carbon gaese

50.

A neutron changes into a proton and an electron releasing this type of particle.

a)

alpha decay

b)

beta decay

c)

gamma decay

d)

all of the above

e)

alpha & beta decay

51.

This particle has 2 protons and 2 neutrons like a helium nucleus.

a)

alpha particle

b)

beta particle

c)

gamma photon

d)

alpha and gamma particles

e)

none of the above

52.

This type of decay creates a new element

a)

alpha

b)

beta

c)

gamma

d)

alpha and beta

e)

none of the above

53.
The first person to propose a theory about an atom was
a)
Democritus
b)
Rutherford
c)
Dalton
d)
Aristotle
54.
What contribution did John Dalton make to atomic theory? 
a)
He discovered that every atom was positively charged. 
b)
He discovered that every element consisted of one type of atom.  
c)
He discovered that atoms had nuclei. 
d)
He discovered that atoms could be divided into smaller parts. 
55.
Niels Bohr suggested that electrons.......
a)
are found in specific orbits
b)
electrons are scattered throughout the atom
c)
electrons move according to their energy level
d)
electrons are positive
56.
His atomic model was depicted similar to a planetary/solar system
a)
Bohr
b)
Thomson
c)
Rutherford
d)
Dalton
57.

What were John Dalton three contributions to atomic history?

a)

Created the atomic theory

b)

Discovered that the atom is mostly empty space

c)

Believed that atoms of a given element are identical

d)

Hypothesized that the atom is a tiny, hard sphere

e)

Believed that the universe was made of tiny "uncuttable" particles

58.

What were J. J. Thomson's three contributions to the atomic theory?

a)

Discovered the electron

b)

Discovered the nucleus -did the gold foil experiment

c)

Used the cathode ray tube in his discovery

d)

Created a model of the atom with electrons moving around the nucleus in fixed orbits

e)

Created the "plum pudding" model of the atom

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