Quiz about Atomic Theory and Discoveries Quiz

Question 1

Who was the first to name the atom?

Accepted Answer

Democritus

Answer

John Dalton

Answer

Dmitri Mendeleev

Answer

JJ Thomson

Question 2

What did John Dalton propose about atoms in 1803?

Accepted Answer

Atoms are solid spheres that can't get any smaller

Answer

Atoms are divisible

Answer

Atoms are positively charged spheres

Answer

Atoms have a nucleus

Question 3

Who developed the first periodic table of elements?

Accepted Answer

Dmitri Mendeleev

Answer

Ernest Rutherford

Answer

Henry Moseley

Answer

JJ Thomson

Question 4

What is the key feature of JJ Thomson's Plum Pudding Model?

Accepted Answer

Atoms are positively charged spheres with negative particles embedded

Answer

Atoms are indivisible

Answer

Atoms have a nucleus

Answer

Atoms are solid spheres

Question 5

What experiment did Ernest Rutherford conduct to develop his nuclear model?

Accepted Answer

Gold foil experiment

Answer

Oil drop experiment

Answer

Cathode ray experiment

Answer

Double-slit experiment

Question 6

What did Henry Moseley discover about elements?

Accepted Answer

The number of protons is unique to each element

Answer

Elements are made of solid spheres

Answer

Atoms are indivisible

Answer

Elements are organized by atomic mass

Question 7

What is the charge of electrons according to the Niels Bohr Model?

Accepted Answer

Negative

Answer

Positive

Answer

Neutral

Answer

No charge

Question 8

According to the Schrodinger and Heisenberg Electron Cloud model, how do electrons behave?

Accepted Answer

Surround the nucleus in an electron cloud that is divided into shells

Answer

Travel in fixed orbits

Answer

Remain stationary

Answer

Move randomly without any pattern

Question 9

What is the nucleus of an atom made of?

Accepted Answer

Protons and neutrons

Answer

Electrons and protons

Answer

Neutrons and electrons

Answer

Only protons

Question 10

Where is the mass of the atom primarily located?

Accepted Answer

Nucleus

Answer

Electron cloud

Answer

Outer shell

Answer

Energy levels

Question 11

What is the charge of the electron cloud?

Accepted Answer

Negative

Answer

Positive

Answer

Neutral

Answer

No charge

Question 12

What is the charge of a proton?

Accepted Answer

Positive

Answer

Negative

Answer

Neutral

Answer

No charge

Question 13

Where are electrons located in an atom?

Accepted Answer

In the electron cloud

Answer

Inside the nucleus

Answer

With the protons

Answer

In the neutron cloud

Question 14

What type of force holds the atom together?

Accepted Answer

Attractive force between the nucleus and electron cloud

Answer

Repulsive force between protons

Answer

Repulsive force between neutrons

Answer

Attractive force between electrons

Question 15

What is the role of quarks in an atom?

Accepted Answer

They are the smallest known particle and make up protons and neutrons

Answer

They make up electrons

Answer

They make up the electron cloud

Answer

They make up the nucleus

Question 16

This subatomic particle is what gives the nucleus an overall positive charge.

Accepted Answer

Protons

Answer

Neutrons

Answer

Electrons

Answer

Quarks

Question 17

This is the space surrounding the nucleus that has an overall negative charge.

Accepted Answer

Electron cloud

Answer

Nucleus

Answer

Valence electrons

Answer

Shells

Question 18

Located in the outermost energy level of the electron cloud, with the most energy.

Accepted Answer

Valence electrons

Answer

Neutrons

Answer

Protons

Answer

Quarks

Question 19

This subatomic particle contributes to the overall mass of an atom, but not its charge.

Accepted Answer

Neutrons

Answer

Electrons

Answer

Protons

Answer

Valence electrons

Question 20

The dense center of an atom.

Accepted Answer

Nucleus

Answer

Electron cloud

Answer

Shells

Answer

Valence electrons

Question 21

The smallest known particles that make up both protons and neutrons.

Accepted Answer

Quarks

Answer

Electrons

Answer

Atoms

Answer

Shells

Question 22

Also known as energy levels, these break up the region of space surrounding the nucleus.

Accepted Answer

Shells

Answer

Nucleus

Answer

Electron cloud

Answer

Valence electrons

Question 23

The subatomic particle located in the space surrounding the nucleus.

Accepted Answer

Electrons

Answer

Protons

Answer

Neutrons

Answer

Quarks

Question 24

Which subatomic particle is located in the nucleus and has a positive charge?

Accepted Answer

Proton

Answer

Electron

Answer

Neutron

Answer

Quark

Question 25

Which subatomic particle is located in the nucleus and has a neutral charge?

Accepted Answer

Neutron

Answer

Electron

Answer

Proton

Answer

Quark

Question 26

Which subatomic particle is located in the electron cloud and has a negative charge?

Accepted Answer

Electron

Answer

Neutron

Answer

Proton

Answer

Quark

Question 27

What does the atomic number of an element tell you?

Accepted Answer

The number of protons in an atom

Answer

The number of neutrons in an atom

Answer

The mass number of an atom

Answer

The number of electrons in an atom

Question 28

Who is credited with arranging the periodic table by atomic number?

Accepted Answer

Henry Moseley

Answer

Dmitri Mendeleev

Answer

Albert Einstein

Answer

Niels Bohr

Question 29

What does the mass number of an atom represent?

Accepted Answer

The number of protons and neutrons

Answer

The number of protons only

Answer

The number of electrons only

Answer

The number of neutrons only

Question 30

What is the symbol for Hydrogen?

Accepted Answer

H

Answer

He

Answer

Hy

Answer

Hg

Question 31

What is the atomic number of Aluminum (Al)?

Accepted Answer

13

Answer

25

Answer

47

Answer

11

Question 32

How many neutrons does an isotope of an element with a mass number of 109 and an atomic number of 47 have?

Accepted Answer

62

Answer

47

Answer

109

Answer

21

Question 33

Which of the following is not an example of isotopes?

Accepted Answer

Hydrogen-1 vs. Helium-4

Answer

Hydrogen-1 vs. Hydrogen-2

Answer

Oxygen-16 vs. Oxygen-18

Answer

Carbon-12 vs. Carbon-14

Question 34

In hyphen notation, how would you represent an atom of potassium with a mass number of 40?

Accepted Answer

Potassium-40

Answer

Potassium-19

Answer

40K

Answer

K-19

Question 35

What is the most stable condition for an atom in terms of protons and neutrons?

Accepted Answer

When the number of protons and neutrons are the same

Answer

When the number of protons is greater than neutrons

Answer

When the number of neutrons is greater than protons

Answer

When the number of electrons is greater than protons

Question 36

What is the hyphen form of Boron with an atomic mass of 11?

Accepted Answer

Boron-11

Answer

Boron-10

Answer

Boron-12

Answer

Boron-13

Question 37

What is the average atomic mass of Hydrogen?

Accepted Answer

1.01

Answer

1.00

Answer

1.10

Answer

1.11

Question 38

What is the most common version of hydrogen in nature?

Accepted Answer

Hydrogen-1

Answer

Hydrogen-2

Answer

Hydrogen-3

Answer

Hydrogen-4

Question 39

What element did you draw if the atom has 4 protons?

Accepted Answer

Beryllium

Answer

Carbon

Answer

Oxygen

Answer

Helium

Question 40

How do you know the number of protons in an atom?

Accepted Answer

By the atomic number

Answer

By the mass number

Answer

By the number of electrons

Answer

By the number of neutrons

Question 41

How do you calculate the number of neutrons in an atom?

Accepted Answer

Mass number - Atomic number

Answer

Atomic number - Mass number

Answer

Number of electrons - Atomic number

Answer

Mass number + Atomic number

Question 42

How do you know the number of electrons in an atom if it is electrically neutral?

Accepted Answer

Same as the number of protons

Answer

Same as the number of neutrons

Answer

Same as the mass number

Answer

Same as the atomic mass

Question 43

Different versions of the same element are known as ______.

Accepted Answer

isotopes

Answer

ions

Answer

molecules

Answer

compounds

Question 44

In the isotopes Carbon-12, Carbon-13, and Carbon-14, the numbers 12, 13, and 14 refer to the ______.

Accepted Answer

mass numbers

Answer

atomic numbers

Answer

electron numbers

Answer

neutron numbers

Question 45

What subatomic particle makes each of these isotopes different?

Accepted Answer

neutrons

Answer

protons

Answer

electrons

Answer

quarks

Question 46

What subatomic particle makes each of these isotopes the same?

Accepted Answer

protons

Answer

neutrons

Answer

electrons

Answer

positrons

Question 47

This form of notation, ²⁴K is known as ______.

Accepted Answer

nuclear form

Answer

chemical form

Answer

molecular form

Answer

atomic form

Question 48

The other form of isotope notation Potassium-25 is known as ______.

Accepted Answer

hyphen form

Answer

nuclear form

Answer

atomic form

Answer

elemental form

Question 49

What is the atomic number of Sodium-24?

Accepted Answer

11

Answer

24

Answer

13

Answer

12

Question 50

How many neutrons are present in Calcium-44?

Accepted Answer

24

Answer

20

Answer

44

Answer

22

Question 51

What is the mass number of Uranium-238?

Accepted Answer

238

Answer

92

Answer

146

Answer

129

Question 52

Which isotope has an atomic number of 53?

Accepted Answer

Iodine-127

Answer

Zinc-64

Answer

Lead-207

Answer

Fluorine-19

Question 53

What is the difference between mass number and average atomic mass?

Accepted Answer

Mass number is the sum of protons and neutrons; average atomic mass is a weighted average of all isotopes.

Answer

Mass number is the sum of electrons and neutrons; average atomic mass is the sum of protons and electrons.

Answer

Mass number is the sum of protons and electrons; average atomic mass is the sum of neutrons and electrons.

Answer

Mass number is the sum of protons and neutrons; average atomic mass is the sum of protons and neutrons.

Question 54

Which term indicates the most common version of an element?

Accepted Answer

Average atomic mass

Answer

Mass number

Answer

Atomic number

Answer

Isotope symbol

Question 55

What is the main purpose of the Periodic Table?

Accepted Answer

To organize elements by their atomic number and chemical properties

Answer

To organize elements by their color

Answer

To organize elements by their size

Answer

To organize elements by their weight

Question 56

Which group in the Periodic Table contains the most reactive metals?

Accepted Answer

Group 1: Alkali metals

Answer

Group 2: Alkaline earth metals

Answer

Group 3: Rare earth metals

Answer

Group 18: Noble gases

Question 57

How many valence electrons do elements in Group 18 typically have?

Accepted Answer

8

Answer

1

Answer

2

Answer

3

Question 58

Which group is known for being nonreactive due to chemical stability?

Accepted Answer

Group 18: Noble gases

Answer

Group 1: Alkali metals

Answer

Group 17: Halogens

Answer

Group 2: Alkaline earth metals

Question 59

What is a characteristic of elements in the same group on the Periodic Table?

Accepted Answer

They have the same number of valence electrons

Answer

They have the same atomic number

Answer

They have the same atomic mass

Answer

They have the same color

Question 60

What is the maximum number of electrons that Level 1 of an electron cloud can hold?

Accepted Answer

2

Answer

8

Answer

18

Answer

10

Question 61

Which group does Magnesium belong to on the periodic table?

Accepted Answer

Group 2

Answer

Group 1

Answer

Group 3

Answer

Group 4

Question 62

How many valence electrons does Magnesium have?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 63

What are the characteristics of metals?

Accepted Answer

Shiny, silvery solids; good conductors of heat and electricity

Answer

Dull, brittle solids; poor conductors

Answer

Gases; poor conductors

Answer

Located on the right of the metalloids

Question 64

Where are nonmetals located on the periodic table?

Accepted Answer

Right of the metalloids

Answer

Left of the metalloids

Answer

In the center of the periodic table

Answer

Below the metalloids

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