Question 1

What keeps the atom all together?

Accepted Answer

Coulomb force

Answer

Friction

Answer

Gravity

Answer

Magnetism

Question 2

What is the Heisenberg's Uncertainty Principle about?

Accepted Answer

Inability to measure both position and speed of an electron at the same time

Answer

Inability to measure the position of an electron

Answer

Inability to measure the speed of an electron

Answer

Inability to measure the charge of an electron

Question 3

What are electrons defined as in Bohr's model?

Accepted Answer

Occupying stable energy levels at a specific distance from the nucleus

Answer

Having no specific location

Answer

Moving randomly in the atom

Answer

Being concentrated in the nucleus

Question 4

Who proposed that electrons could also be waves?

Accepted Answer

Louie de Broglie

Answer

Erwin Schrödinger

Answer

Niels Bohr

Answer

Max Planck

Question 5

What did Schrodinger create using the concept of electrons as waves?

Accepted Answer

A mathematical equation as an example of the atom

Answer

A machine to measure electron speed

Answer

A new theory of gravity

Answer

A physical model of the atom

Question 6

What did Heisenberg find about the site and movement of a tiny particle like the electron?

Accepted Answer

Its site cannot be exactly recognized and even the way it is moving

Answer

It is constantly moving in a straight line

Answer

Its site can be easily recognized

Answer

It has a fixed position around the nucleus

Question 7

What does the quantum mechanical model of the atom perceive an electron as?

Accepted Answer

A cloud of electric charge having a selected geometrical shape

Answer

An invisible force field

Answer

A solid particle with a definite size

Answer

A point with no spatial extent

Question 8

Which quantum number gives the number of the main energy level where the electron revolves?

Accepted Answer

n

Answer

ml

Answer

ms

Answer

l

Question 9

Which quantum number measures the angular momentum of the electron?

Accepted Answer

l

Answer

ms

Answer

n

Answer

ml

Question 10

Which quantum number refers to the behavior of an electron in a magnetic field?

Accepted Answer

m

Answer

l

Answer

n

Answer

ms

Question 11

Which quantum number describes the spin of an electron about its axis?

Accepted Answer

s

Answer

l

Answer

ml

Answer

n

Question 12

What is the range of values that the principal quantum number (n) can have?

Accepted Answer

From 1 onwards

Answer

From 1 to n-1

Answer

From 0 onwards

Answer

From 0 to n-1

Question 13

What does the secondary quantum number (l) indicate?

Accepted Answer

The number of sublevels in each energy level

Answer

The number of electrons in each sublevel

Answer

The number of protons in each atom

Answer

The total number of energy levels

Question 14

What is the value of the magnetic quantum number (m) for an electron with maximum angular momentum?

Accepted Answer

1

Answer

½

Answer

0

Answer

-1

Question 15

Which direction represents an electron spinning clockwise?

Accepted Answer

⬇️

Answer

⬆️

Answer

⬅️

Answer

➡️

Question 16

What is the value of the spin quantum number (s) for an electron spinning counterclockwise?

Accepted Answer

+½

Answer

0

Answer

-1

Answer

-½

Question 17

How many sublevels are there in an energy level with a principal quantum number (n) equal to 3?

Accepted Answer

3

Answer

4

Answer

2

Answer

1

Question 18

Which sublevels are smaller subdivisions of energy within the energy levels?

Accepted Answer

s, p, d, and f

Answer

g, h, i, and j

Answer

r, t, w, and z

Answer

m, s, b, and q

Question 19

What is the superscript in electron configuration?

Accepted Answer

number of electrons

Answer

atomic mass

Answer

valence electrons

Answer

atomic number

Question 20

What principle is being described? No two electrons can be found by the same set of quantum numbers.

Accepted Answer

Pauli's Exclusion Principle

Answer

Aufbau Principle

Answer

Hund's Rule

Answer

Heisenberg's Uncertainty Principle

Question 21

What principle is being described? One electron gets into each up to all of them are full before pairing up.

Accepted Answer

Hund's Rule

Answer

Aufbau Principle

Answer

Pauli's Exclusion Principle

Answer

Heisenberg's Uncertainty Principle

Question 22

What principle is being described? The lower energy orbitals fill up before higher energy orbitals.

Accepted Answer

Aufbau Principle

Answer

Hund's Rule

Answer

Pauli's Exclusion Principle

Answer

Heisenberg's Uncertainty Principle

Question 23

What type of bond is formed between two ions by the complete transfer of electrons?

Accepted Answer

Ionic bond

Answer

Covalent bond

Answer

Van der Waals bond

Answer

Metallic bond

Question 24

What are the positively charged elements that lose electrons called?

Accepted Answer

Cations

Answer

Metals

Answer

Metalloids

Answer

Anions

Question 25

Which type of bond is formed by the sharing of electrons between two non-metals?

Accepted Answer

Covalent bond

Answer

Metallic bond

Answer

Hydrogen bond

Answer

Ionic bond

Question 26

What is the compound formed by a covalent bond commonly called?

Accepted Answer

Molecule

Answer

Compound

Answer

Ion

Answer

Element

Question 27

What is the specific name for a bond where there is unequal sharing of electrons?

Accepted Answer

Polar covalent bond

Answer

Metallic bond

Answer

Non-polar covalent bond

Answer

Ionic bond

Question 28

What is the common physical state of ionic compounds?

Accepted Answer

Solid

Answer

Liquid

Answer

Plasma

Answer

Gas

Question 29

Which type of compounds have higher melting and boiling points: ionic or covalent?

Accepted Answer

Ionic

Answer

It depends on the compound

Answer

They have the same

Answer

Covalent

Question 30

Which type of compounds tend to have a softer texture: ionic or covalent?

Accepted Answer

Covalent

Answer

Metallic

Answer

Ionic

Answer

Non-metallic

Question 31

What is the octet rule?

Accepted Answer

An atom loses, gains, or shares electrons to have a full valence shell of 8 electrons.

Answer

An atom loses, gains, or shares electrons to have a full valence shell of 6 electrons.

Answer

An atom loses, gains, or shares electrons to have a full valence shell of 4 electrons.

Answer

An atom loses, gains, or shares electrons to have a full valence shell of 2 electrons.

Question 32

Which group of elements are the most stable elements?

Accepted Answer

Noble gases

Answer

Alkali metals

Answer

Halogens

Answer

Transition metals

Question 33

What are monoatomic ions?

Accepted Answer

Ions that contain only one atom

Answer

Ions that contain only neutrons

Answer

Ions that contain two or more atoms

Answer

Ions that contain only protons

Question 34

What are polyatomic ions?

Accepted Answer

Ions that contain two or more atoms

Answer

Ions that contain only electrons

Answer

Ions that contain only one atom

Answer

Ions that contain only protons

Question 35

What is a Lewis Electron Dot Structure used for?

Accepted Answer

To show the valence electrons of an element

Answer

To show the neutrons of an element

Answer

To show the innermost electrons of an element

Answer

To show the protons of an element

Question 36

What is the 'criss-cross' method used for?

Accepted Answer

Identifying the chemical formula of an ionic compound

Answer

Identifying the atomic number of an element

Answer

Identifying the number of valence electrons

Answer

Identifying the charge of an ion

Question 37

What is the term for the linkage of atoms of the same element into longer chains?

Accepted Answer

Catenation

Answer

Isomerism

Answer

Hydration

Answer

Polymerization

Question 38

What are the three primary allotropes of carbon?

Accepted Answer

Diamond, graphite, and fullerenes

Answer

Buckyballs, carbon fibers, and carbon nanotubes

Answer

Amorphous carbon, graphene, and nanotubes

Answer

Coal, charcoal, and soot

Question 39

What type of bond is present in organic compounds?

Accepted Answer

Covalent bond

Answer

Metallic bond

Answer

Ionic bond

Answer

Hydrogen bond

Question 40

What are typical elements found in organic compounds, in addition to carbon?

Accepted Answer

Hydrogen, Oxygen, and Nitrogen

Answer

Iron, Copper, and Zinc

Answer

Helium, Neon, and Argon

Answer

Sodium, Potassium, and Calcium

Question 41

Which property describes a liquid's resistance to flow?

Accepted Answer

Viscosity

Answer

Malleability

Answer

Flammability

Answer

Volatility

Question 42

What property describes how easily a substance will vaporize at room temperature?

Accepted Answer

Volatility

Answer

Odor

Answer

Flammability

Answer

Viscosity

Question 43

Why are most organic compounds highly flammable?

Accepted Answer

Due to the presence of Carbon and Hydrogen atoms

Answer

Due to the absence of Oxygen atoms

Answer

Due to the presence of Metal atoms

Answer

Due to the presence of Oxygen atoms

Question 44

What does the empirical formula of an organic compound represent?

Accepted Answer

The simple whole-number ratio of atoms in a compound.

Answer

The total number of atoms for each element in a compound.

Answer

The bonds present in a molecule.

Answer

The structure of the compound.

Question 45

What does the molecular formula of an organic compound represent?

Accepted Answer

The total number of atoms for each element in a compound.

Answer

The structure of the compound.

Answer

The simple whole-number ratio of atoms in a compound.

Answer

The bonds present in a molecule.

Question 46

What does the expanded structural formula of a molecule show?

Accepted Answer

All the atoms and bonds present in a molecule.

Answer

The simple whole-number ratio of atoms in a compound.

Answer

The total number of atoms for each element in a compound.

Answer

The structure of the compound.

Question 47

What are hydrocarbons?

Accepted Answer

The simplest type of organic compounds.

Answer

Compounds with double or triple bonds between two carbon atoms.

Answer

Compounds formed by substituents attached to hydrocarbon chains.

Answer

Compounds containing functional groups.

Question 48

What is the classification of hydrocarbons based on the bonds between carbon atoms?

Accepted Answer

Saturated and unsaturated.

Answer

Alkenes and alkynes.

Answer

Aliphatic and aromatic.

Answer

Primary and secondary.

Question 49

What are alkanes?

Accepted Answer

Examples of saturated hydrocarbons.

Answer

Compounds with double or triple bonds between two carbon atoms.

Answer

Functional groups attached to hydrocarbon chains.

Answer

Examples of unsaturated hydrocarbons.

Question 50

What is the naming system for alkanes?

Accepted Answer

Use the appropriate prefix and add the suffix -ane.

Answer

Use the appropriate prefix and add the suffix -yne.

Answer

Use the appropriate prefix and add the suffix -yl.

Answer

Use the appropriate prefix and add the suffix -ene.

Question 51

What does the condensed structural formula of a molecule show?

Accepted Answer

All the atoms but the bonds are not written.

Answer

The total number of atoms for each element in a compound.

Answer

The simple whole-number ratio of atoms in a compound.

Answer

The structure of the compound.

Question 52

What is the unit used to express the atomic mass of elements?

Accepted Answer

grams

Answer

meters

Answer

kilograms

Answer

liters

Question 53

What is the weighted average of masses of all isotopes of an element called?

Accepted Answer

Atomic Mass

Answer

Molecular Mass

Answer

Formula Mass

Answer

Mole

Answer

Atomic Weight

Question 54

What is the sum of the atomic masses of each atom in a molecule called?

Accepted Answer

Molecular Mass

Answer

Molar Mass

Answer

Formula Mass

Answer

Atomic Mass

Answer

Avogadro's number

Question 55

How do you calculate the molecular mass of a compound?

Accepted Answer

Write the element and its chemical symbol, Write the number of atoms based on the given element, Determine the atomic mass of each element using the periodic table. Round it off to the nearest whole number. Multiply the number of atoms of each element to its rounded-off atomic mass. Then, add the products.

Answer

Multiply the number of atoms by the atomic mass of each element

Answer

Divide the number of atoms by the atomic mass of each element

Answer

Subtract the atomic masses of each atom in the molecule

Answer

Add the atomic masses of each atom in the molecule

Question 56

What is the molar mass of water?

Accepted Answer

18 g/mol

Answer

12 g/mol

Answer

28 g/mol

Answer

6.02 x 10^23 g/mol

Question 57

How do you convert the mass of a substance to its number of particles?

Accepted Answer

Convert the given mass to mole by dividing it with the molar mass. Then, convert the computed mole to the number of particles by multiplying it with Avogadro's number.

Answer

Convert the given mass to mole by subtracting it from Avogadro's number. Then, convert the computed mole to the number of particles by multiplying it with the molar mass.

Answer

Convert the given mass to mole by multiplying it with Avogadro's number. Then, convert the computed mole to the number of particles by dividing it with the molar mass.

Answer

Convert the given mass to mole by dividing it with Avogadro's number. Then, convert the computed mole to the number of particles by multiplying it with the molar mass.

Answer

Convert the given mass to mole by adding it to Avogadro's number. Then, convert the computed mole to the number of particles by dividing it with the molar mass.

Question 58

How do you convert moles of a substance to grams?

Accepted Answer

Multiply the number of moles by the molar mass.

Answer

Divide the number of moles by Avogadro's number.

Answer

Multiply the number of moles by Avogadro's number.

Answer

Multiply the molar mass by the number of moles.

Answer

Divide the molar mass by the number of moles.

Question 59

What is the percentage composition of a compound?

Accepted Answer

The ratio between the mass of the element and total mass of the compound multiplied by one hundred.

Answer

The ratio between the atomic number of the element and the total atomic number of the compound multiplied by one hundred.

Answer

The ratio between the volume of the element and the total volume of the compound multiplied by one hundred.

Answer

The ratio between the number of atoms in the element and the total number of atoms in the compound.

Question 60

What is the formula for the percentage composition of an element in a compound?

Accepted Answer

% mass of E = (mass of element / total mass of compound) * 100

Answer

% mass of E = mass of element * total mass of compound

Answer

% mass of E = total mass of compound / mass of element

Answer

% mass of E = mass of element - total mass of compound

Question 61

In the compound NaCl, what is the % by mass of sodium?

Accepted Answer

40%

Answer

50%

Answer

20%

Answer

30%

Question 62

What is an empirical formula?

Accepted Answer

The simplest whole-number ratio of the elements present in a chemical compound.

Answer

The formula that contains the actual number of atoms in a chemical compound.

Answer

The formula that represents the molecular structure of a compound.

Answer

The formula that shows the arrangement of elements in a compound.

Question 63

What is a molecular formula?

Accepted Answer

The formula that contains the actual number of atoms in a chemical compound.

Answer

The formula that represents the molecular structure of a compound.

Answer

The simplest whole-number ratio of the elements present in a chemical compound.

Answer

The formula that shows the arrangement of elements in a compound.

Question 64

What should the total percentage of all elements in a compound be?

Accepted Answer

100%

Answer

50%

Answer

75%

Answer

200%

Related quizzes

Related quizzes