Quiz about Unit 4: Atoms

Question 1

The atom is...

Accepted Answer

The basic building block of matter

Answer

Unimportant

Answer

Important in creating protons

Answer

I don't know

Question 2

What are atoms composed of?

Accepted Answer

Protons, neutrons, electrons

Answer

Mass, oxygen, matter

Answer

Protons, mass, nuclei

Answer

Electrons, matter, neutrons

Question 3

_____ orbit the atomic nucleus.

Accepted Answer

Electrons

Answer

Protons

Answer

Matter

Answer

Atoms

Question 4

Protons have ____ charge.

Accepted Answer

a positive

Answer

no

Answer

a negative

Answer

a neutral

Question 5

Electrons have ____ charge.

Accepted Answer

a negative

Answer

no

Answer

a positive

Answer

a neutral

Question 6

What does the atomic number equal?

Accepted Answer

The number of protons

Answer

The number of electrons

Answer

The number of neutrons

Answer

The number of atoms.

Question 7

An atomic model is NOT a reliable representation of an atom.

Accepted Answer

False

Answer

True

Question 8

What is the nature of an element determined by?

Accepted Answer

The number of protons

Answer

The number of electrons

Answer

The number of neutrons

Answer

Nothing

Question 9

What is the atomic number of this element?

Accepted Answer

6

Answer

12.011

Answer

C

Answer

None of the above

Question 10

What is the atomic mass the sum of?

Accepted Answer

Protons and neutrons

Answer

Only protons

Answer

Only electrons

Answer

Protons and electrons

Question 11

How many neutrons are in Neon

Accepted Answer

10

Answer

20

Answer

30

Question 12

Cobalt has 27 protons, 32 neutrons, and 27 electrons. What is the atomic number?

Accepted Answer

27

Answer

32

Answer

59

Answer

5

Question 13

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.

Accepted Answer

The "Rutherford Model" of the atom

Answer

The "Plum Pudding Model" of the atom

Answer

The "Quantum Mechanical Modell" of the atom

Answer

Democritus's model of the atom

Question 14

This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.

Accepted Answer

Democritus's model of the atom

Answer

The "Plum Pudding Model" of the atom

Answer

The "Rutherford Model" of the atom

Answer

The "Quantum Mechanical Model" of the atom

Question 15

This is the most complete and current model of the atom. It consists of 61 elementary particles. Electrons are located in complex orbitals.

Accepted Answer

The "Quantum Mechanical Model" of the atom

Answer

The "Rutherford Model" of the atom

Answer

The "Plum Pudding Model" of the atom

Answer

The "Bohr Model" of the atom

Question 16

This model added on to previous models by showing electrons existed at certain "energy levels". However it does not accurately show what those levels look like.

Accepted Answer

The "Bohr Model" of the atom

Answer

The "Rutherford Model" of the atom

Answer

The "Plumb Pudding Model" of the atom

Answer

The "Quantum Mechanical Model" of the atom

Question 17

This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.

Accepted Answer

The "Plum Pudding Model" of the atom

Answer

The "Rutherford Model" of the atom

Answer

Democritus's model of the atom

Answer

The "Quantum Mechanical Model" of the atom

Question 18

Ernest Rutherford discovered that atoms were mostly _________________.

Accepted Answer

empty space.

Answer

negatively charged

Answer

positively charged

Answer

electrons

Question 19

What does the nucleus of an atom contain?

Accepted Answer

Protons & Neutrons

Answer

Electrons & Neutrons

Answer

Neutrinos & Positrons

Question 20

What can you conclude from the fact that scientists continue to update the atomic model?

Accepted Answer

New information about atoms continues to be discovered

Answer

Old information about atoms is completely useless

Answer

Scientists did not have any information about atoms until a few years ago

Answer

Scientists still have no idea what atoms look like

Question 21

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?

Accepted Answer

Atoms are mostly empty space with a small, dense, positive center

Answer

Atoms are small indivisible spheres

Answer

Atoms have negatively charged particles which orbit the nucleus

Answer

Light is a wave, not a particle

Question 22

Discovered the electron using cathode ray tube

Accepted Answer

Joseph Thomson

Answer

John Dalton

Answer

Ernest Rutherford

Answer

Robert Millikan

Question 23

His atomic model included a dense positive core in an atom, surrounded by negatively charged particles

Accepted Answer

Ernest Rutherford

Answer

Joseph Thomson

Answer

Niels Bohr

Question 24

Atomic model was termed the "plum pudding model"

Accepted Answer

Joseph Thomson

Answer

Niels Bohr

Answer

Ernest Rutherford

Question 25

Idea was of an indivisible particle of matter he called "atomos"

Accepted Answer

Democritus

Answer

John Dalton

Answer

Aristotle

Answer

Plato

Question 26

What scientist is best known for his gold foil experiment?

Accepted Answer

Ernest Rutherford

Answer

J.J. Tomson

Answer

John Dalton

Answer

Democritus

Question 27

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

A) Rutherford B) Thomson C) Dalton

Accepted Answer

C, B, A

Answer

B, C, A

Answer

C, A, B

Answer

A, C, B

Question 28

Which scientists believed an atom was indivisible? (Choose all correct responses.)

Accepted Answer

Democritus

Accepted Answer

Dalton

Answer

Thomson

Answer

Rutherford

Question 29

Which scientist believed that elements differed from one another because their atoms had different mass?

Accepted Answer

Dalton

Answer

Democritus

Answer

Thomson

Answer

Rutherford

Question 30

Dalton developed the first scientifically tested atomic theory.

Accepted Answer

True

Answer

False

Question 31

Chadwick found the nucleus through the gold foil experiment.

Accepted Answer

False

Answer

True

Question 32

Aristotle and other early Greek philosophers thought that matter was composed of four elements: air, earth, fire, and water.

Accepted Answer

True

Answer

False

Question 33

Cathode rays contain a negative charge.

Accepted Answer

True

Answer

False

Question 34

Which scientist measured the charge on an electron as 1.602 x 10-19 Coulombs?

Accepted Answer

Millikan

Answer

Democritus

Answer

Rutherford

Answer

Bohr

Question 35

Researchers discovered a subatomic particle while working with the cathode ray tube. The particle is known as a(n) ____________________.

Accepted Answer

electron

Answer

proton

Answer

neutron

Question 36

A ____________________ is a subatomic particle that has mass nearly equal to that of a proton, but it carries no electrical charge.

Accepted Answer

neutron

Answer

proton

Answer

electron

Question 37

An alpha particle is _____________________ charged with two protons and neutrons.

Accepted Answer

positively

Answer

negatively

Answer

neutrally

Question 38

James Chadwick showed that the nucleus also contained a neutral subatomic particle known as the ____________________.

Accepted Answer

neutron

Answer

proton

Answer

electron

Question 39

How many neutrons are in an atom of carbon-14?

Accepted Answer

8

Answer

6

Answer

10

Answer

14

Question 40

How many protons does this isotope of titanium have?

Accepted Answer

22

Answer

26

Answer

48

Answer

70

Question 41

How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?

Accepted Answer

36

Answer

2

Answer

34

Answer

40

Question 42

Write the hyphen notation for the isotope that has 39 protons and 50 neutrons.

Accepted Answer

Yttrium-89

Answer

Yttrium-11

Answer

Tin-39

Answer

Tin-89

Question 43

Chromium has four naturally occurring isotopes (chromium-50, chromium-52, chromium-53, and chromium-54). What is the average atomic mass of Chromium?

Accepted Answer

51.996

Answer

4

Answer

52.25

Answer

Not enough information was given.

Question 44

An element has three isotopes. Given the abundances and relative masses, calculate the average atomic mass and determine (from the periodic table) which element it is.

Abundances | Relative masses

0.005% | 234.04 amu

0.720% | 235.04 amu

99.275% | 238.05 amu

Accepted Answer

Uranium (#92, Atomic Mass: 238.03 amu)

Answer

Fluorine (#9, Atomic Mass: 19.00 amu)

Answer

Mercury (#89, Atomic Mass: 200.59 amu)

Answer

Polonium (#84 209 amu)

Question 45

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.

Accepted Answer

207

Answer

204

Answer

206

Answer

208

Question 46

Why are ions formed?

Accepted Answer

Because atoms want to be stable

Answer

To make our lives difficult

Answer

Because atoms have the same number of protons and electrons

Answer

Because atoms gained neutrons

Question 47

What is the charge of an atom that has lost one electron?

Accepted Answer

+1

Answer

-1

Answer

-2

Answer

+2

Question 48

What is the atomic mass of Copper?

Accepted Answer

63

Answer

29

Answer

34

Answer

92

Question 49

How many neutrons are in a Gold atom?

Accepted Answer

117

Answer

79

Answer

196

Answer

275

Question 50

An atom with 10 protons, 8 neutrons, 8 electrons is a _______. (Choose all that apply)

Accepted Answer

ion

Accepted Answer

cation

Answer

anion

Answer

neutral atom

Question 51

A negatively charged ion that has gained electrons to satisfy the octet rule

Accepted Answer

Anion

Answer

Cation

Answer

Neutral Atom

Answer

Isotope

Question 52

Atoms of the same element that have different mass than expected because they have a different number of neutrons.

Accepted Answer

Isotope

Answer

Neutral Atom

Answer

Ion

Answer

Cation

Question 53

If an ion has a negative charge you would __________ the charge number to the number of protons to figure out how many electrons there are.

Accepted Answer

Add

Answer

Subtract

Answer

Divide

Answer

Multiply

Question 54

How many protons, neutrons, and electrons?

Accepted Answer

proton = 4, neutron = 2, electron = 3

Answer

proton = 6, neutron = 4, electron = 1

Answer

proton = 4, neutron = 4, electron = 5

Answer

proton = 1, neutron = 6, electron = 10

Question 55

How many protons, neutrons, and electrons?

Accepted Answer

proton = 8, neutron = 8, electron = 10

Answer

proton = 16, neutron = 8, electron = 10

Answer

proton = 8, neutron = 16, electron = 8

Answer

proton = 6, neutron = 2, electron = 6

Question 56

What is a representation of an ion?

Accepted Answer

O-2

Answer

Li

Answer

Na-22

Question 57

What type of atom is this?

Accepted Answer

Cation

Answer

Neutral atom

Answer

Anion

Answer

Isotope

Question 58

An atom with the same number of protons and electrons (no charge) and the expected atomic mass or number of neutrons from the periodic table.

Accepted Answer

Neutral/Normal Atom

Answer

Ion

Answer

Isotope

Question 59

Can an atom of Hydrogen have 2 protons?

Accepted Answer

No, because protons identify the atom

Answer

Yes, because it can be an ion

Answer

Yes, because it can be an isotope

Answer

No, because only neutral atoms exist

Question 60

Can an atom of Helium have 3 electrons?

Accepted Answer

Yes, because it can be an ion

Answer

No, because protons identify the atom

Answer

Yes, because it can be an isotope

Answer

No, because only neutral atoms exist

Question 61

Can an atom of Helium have 3 neutrons?

Accepted Answer

Yes, because it can be an isotope

Answer

Yes, because it can be an ion

Answer

No, because protons identify the atom

Answer

No, because only neutral atoms exist

Question 62

The atomic mass of an element is the ___.

Accepted Answer

weighted average of the masses of the isotopes of the element

Answer

average of the mass number and the atomic number for the element

Answer

total mass of the isotopes of the element

Answer

total number of subatomic particles in the nucleus

Question 63

Compute the average atomic mass for silicon:

Accepted Answer

28.09

Answer

27.977

Answer

28.976

Answer

The average mass cannot be determined from provided information.

Question 64

An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?

Accepted Answer

10.812, Boron

Answer

9.012, Beryllium

Answer

12.011, Carbon

Answer

6.941, Lithium

Unit 4: Atoms

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