# Atomic Structure And The Periodic Table

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This test covers the unit atoms and the periodic table.   If you did not put your name in before starting this test you need to go back and do that before proceeding (a quiz with no name will score a zero).   You will also need a periodic table, the one located in the back of the textbook will be fine.

• 1.

### What is the atomic number for the atom in this picture?

• A.

4

• B.

6

• C.

12

• D.

18

• E.

36

B. 6
Explanation
The atomic number represents the number of protons in an atom's nucleus, which determines the element's identity. In this case, the correct answer is 6, indicating that the atom in the picture has 6 protons.

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• 2.

### What is the atomic mass of this atom?

• A.

4

• B.

6

• C.

12

• D.

18

• E.

24

E. 24
Explanation
The atomic mass of an atom is the sum of the number of protons and neutrons in its nucleus. In this question, the correct answer is 24, which suggests that the atom in question has 24 protons and neutrons combined.

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• 3.

### How many electrons are in the outer orbital of this atom?

• A.

2

• B.

6

• C.

12

• D.

18

• E.

24

A. 2
Explanation
The correct answer is 2 because the atom's outer orbital can hold a maximum of 2 electrons. This is based on the octet rule, which states that atoms tend to gain, lose, or share electrons in order to achieve a stable electron configuration with 8 electrons in their outermost shell. Therefore, if the outer orbital already has 2 electrons, it is considered full and no more electrons can be added to it.

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• 4.

### The name of this atom is?

• A.

Oxygen

• B.

Nitrogen

• C.

Boron

• D.

Magnesium

• E.

Carbon

D. Magnesium
Explanation
Magnesium is the correct answer because it is the name of the atom being referred to in the question. The other options (Oxygen, Nitrogen, Boron, Carbon) are different elements and not the name of the atom in question.

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• 5.

### Name a subatomic particle that this atom may not change.

• A.

Electron

• B.

Proton

• C.

Neutron

• D.

Isotope

• E.

Ion

B. Proton
Explanation
The atom may not change a proton because protons are positively charged particles found in the nucleus of an atom. They determine the atomic number and identity of the element. While atoms can gain or lose electrons (forming ions), change their number of neutrons (forming isotopes), or even combine with other atoms, the number of protons remains constant in a given element. Therefore, a proton is a subatomic particle that an atom may not change.

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• 6.

### By adding or removing an electron you would create...

• A.

A proton

• B.

An isotope

• C.

An ion

• D.

• E.

A half life

C. An ion
Explanation
By adding or removing an electron, an ion is created. An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a positive or negative charge. This process occurs when an atom gains or loses electrons to achieve a stable electron configuration. Therefore, the correct answer is "an ion".

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• 7.

### By adding or taking away a neutron you would create ...

• A.

A proton

• B.

An isotope

• C.

An ion

• D.

• E.

A half life

B. An isotope
Explanation
By adding or taking away a neutron from an atom, you would create an isotope. Isotopes are atoms of the same element that have different numbers of neutrons. This results in variations in their atomic mass, but they still have the same number of protons and electrons, making them the same element. Therefore, the correct answer is "an isotope."

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• 8.

### What is the name for this atom?

• A.

Tin

• B.

• C.

Iron

• D.

Cobolt

• E.

Praseodymium

D. Cobolt
• 9.

### What is the atomic mass of this element?

• A.

27

• B.

32

• C.

59

• D.

86

• E.

197

C. 59
Explanation
The correct answer is 59 because the question is asking for the atomic mass of the element. The atomic mass is the average mass of all the isotopes of an element, taking into account their abundance. Among the given options, 59 is the only value that represents a possible atomic mass.

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• 10.

### How many electrons does the neutral version of the atom have?

• A.

0

• B.

118

• C.

39

• D.

79

• E.

-39

D. 79
Explanation
The neutral version of an atom means that it has an equal number of protons and electrons, resulting in a net charge of zero. Therefore, the neutral version of the atom will have 79 electrons, as indicated by the answer choice.

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• 11.

### An atom is...

• A.

Solid

• B.

Almost solid

• C.

Solid with areas for the charges

• D.

Solid like a bunch of little balls clumped together

• E.

Almost all empty space

E. Almost all empty space
Explanation
An atom is mostly empty space because it consists of a small, dense nucleus surrounded by electrons that occupy a much larger volume. The nucleus contains protons and neutrons, which have mass, while the electrons have negligible mass and are constantly moving around the nucleus in electron orbitals. The vast majority of an atom's volume is therefore empty space, with the electrons occupying only a tiny fraction of it.

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• 12.

### According to the picture below what can you tell me about electrons?

• A.

They are extremly close to the nucleus

• B.

They are attracted to other electrons

• C.

They travel only one path

• D.

They can be found in more than one orbital shell

• E.

They are in the nucleus

D. They can be found in more than one orbital shell
Explanation
The correct answer suggests that electrons can be found in more than one orbital shell. This means that electrons can occupy different energy levels or orbitals around the nucleus of an atom. The concept of orbital shells is a fundamental aspect of the electron configuration and the arrangement of electrons in an atom. Electrons can exist in different shells, each with a specific energy level. This answer implies that electrons are not limited to a single path or location but can occupy different regions around the nucleus.

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• 13.

### DNA is a molecule...

• A.

Made up of lots of atoms

• B.

Made up of lots of balls

• C.

That is straight

• D.

Made up of only a few atoms

• E.

A. Made up of lots of atoms
Explanation
DNA is a molecule that is composed of many atoms. It is a complex structure made up of nucleotides, which consist of a sugar molecule, a phosphate group, and a nitrogenous base. These components are connected by covalent bonds, forming a long, double-stranded helix. Therefore, DNA is not made up of only a few atoms or solely carbon, but rather contains a large number of atoms that contribute to its intricate structure and function.

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• 14.

### This is a molecule of a...

• A.

Plasma

• B.

Gas

• C.

Liquid

• D.

Solid

• E.

Suspension

D. Solid
Explanation
The molecule in question is classified as a solid. Solids have a definite shape and volume, and their molecules are tightly packed together in a regular arrangement. This is in contrast to gases, which have no definite shape or volume and have molecules that are spread out and move freely. Liquids also lack a definite shape but have a definite volume, while suspensions are mixtures where solid particles are dispersed in a liquid or gas. However, the given information does not provide any specific details about the molecule, so further context is needed to determine its specific properties.

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• 15.

### This is a model of a...

• A.

Element

• B.

Compound

• C.

Atom

• D.

Ion

• E.

Isotope

B. Compound
Explanation
This model represents a compound. A compound is a substance made up of two or more different elements chemically bonded together. In this model, there are multiple elements present, indicating that it is not just a single element or atom. Additionally, the presence of multiple elements suggests that it is not an ion, which is an atom or molecule with a net electric charge. It is also not an isotope, which refers to different forms of the same element with varying numbers of neutrons. Therefore, the most appropriate answer is a compound.

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• 16.

### K Ca Ti and Ge are all in the same....

• A.

Liquid

• B.

Solid

• C.

State

• D.

Period

• E.

Group

D. Period
Explanation
K (potassium), Ca (calcium), Ti (titanium), and Ge (germanium) are all elements in the periodic table. The periodic table is organized into periods, which are horizontal rows that represent the number of electron shells an element has. Since K, Ca, Ti, and Ge are all elements, they would be found in the same period of the periodic table. Therefore, the correct answer is "period."

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• 17.

### Which 2 elements behave in the same way?

• A.

H and Be

• B.

Au and He

• C.

Zn and Hg

• D.

Ni and Na

• E.

Cl and Ba

C. Zn and Hg
Explanation
Zn and Hg behave in the same way because they both belong to the same group in the periodic table, Group 12. They are both transition metals and have similar chemical properties. Additionally, they have similar atomic structures and exhibit similar reactivity patterns. Therefore, Zn and Hg behave in the same way.

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• 18.

### Carbon 14 is a naturally occuring radioactive isotope.  How many neutrons are in the isotope carbon 14

• A.

6

• B.

7

• C.

8

• D.

14

• E.

0

C. 8
Explanation
Carbon 14 is an isotope of carbon, which means it has the same number of protons but a different number of neutrons compared to the most common form of carbon, carbon 12. The atomic number of carbon is 6, which means it has 6 protons. The atomic mass of carbon 14 is 14, which means it has 14 total particles (protons + neutrons). Since the atomic number is 6, there must be 8 neutrons in carbon 14 (14 - 6 = 8).

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• 19.

### What is the difference between the number of neutrons of Carbon 14 and Nitrogen 14?

• A.

28

• B.

14

• C.

7

• D.

1

• E.

0

D. 1
Explanation
The difference between the number of neutrons of Carbon 14 and Nitrogen 14 is 1. Carbon 14 has 8 neutrons, while Nitrogen 14 has 7 neutrons.

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• 20.

### How many neutrons in the isotope Sodium 22.

• A.

11

• B.

1

• C.

12

• D.

22

• E.

0

A. 11
Explanation
The isotope Sodium 22 has an atomic number of 11, which represents the number of protons in the nucleus. Since neutrons are found in the nucleus and the atomic mass of Sodium 22 is 22, we can subtract the atomic number from the atomic mass to find the number of neutrons. Therefore, Sodium 22 has 11 neutrons.

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• 21.

### This is the atom Nitrogen with no charge.  The Ion form of nitrogen with a +1 charge has how many electrons?

• A.

1

• B.

2

• C.

6

• D.

7

• E.

8

C. 6
Explanation
The atom of Nitrogen has 7 electrons in its neutral state. When it forms an ion with a +1 charge, it loses one electron. Therefore, the ion of Nitrogen with a +1 charge will have 6 electrons.

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• 22.

### This is the atom form of nitrogen.  The Ion of Nitrogen with a charge of +2 has how many electrons?

• A.

1

• B.

2

• C.

3

• D.

4

• E.

5

E. 5
Explanation
The atom form of nitrogen has 5 electrons. When an atom loses two electrons and becomes an ion with a charge of +2, it means that it now has 2 fewer electrons. Therefore, the ion of nitrogen with a charge of +2 would have 5 - 2 = 3 electrons.

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• 23.

### This is the atom nitrogen.  If the atom turns into an ion with a -1 charge how many protons does the atom have?

• A.

1

• B.

2

• C.

6

• D.

7

• E.

8

D. 7
Explanation
When an atom turns into an ion with a -1 charge, it means that it has gained one extra electron. Since electrons have a negative charge and protons have a positive charge, the number of protons in an atom determines its atomic number. Since the ion has a -1 charge, it means that it has one more electron than protons. Therefore, the atom must have 7 protons, as indicated in the answer choice 7.

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• Current Version
• Mar 20, 2023
Quiz Edited by
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• Oct 06, 2008
Quiz Created by
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