Question 1

Which atomic model is proposed by Schrodinger?

Accepted Answer

Quantum Mechanical Model

Answer

planetary model

Answer

nuclear model

Answer

raisin bread model

Question 2

The symbol “n” in the Bohr theory of atomic structure refers to the ___

Accepted Answer

energy of electron

Answer

total energy of the atom

Answer

orbit in which an electron is found

Answer

number of electron in an energy level

Question 3

For numbers 3-6, consider the following set of quantum numbers

n= 4 ℓ = 2 m_ℓ =+1 m_s= - ½

The electron which has the given set of quantum numbers occupies sublevel

Accepted Answer

d

Answer

p

Answer

f

Answer

s

Question 4

For numbers 3-6, consider the following set of quantum numbers

n= 4 ℓ = 2 m_ℓ =+1 m_s= - ½

The orbital designation of the electron is ___.

Accepted Answer

4d

Answer

4s

Answer

4f

Answer

4p

Question 5

For numbers 3-6, consider the following set of quantum numbers

n= 4 ℓ = 2 m_ℓ =+1 m_s= - ½

How many orbitals does this set of quantum numbers represent?

Accepted Answer

1

Answer

5

Answer

7

Answer

3

Question 6

For numbers 3-6, consider the following set of quantum numbers

n= 4 ℓ = 2 m_ℓ =+1 m_s= - ½

How many electrons are represented by this set of quantum numbers?

Accepted Answer

1

Answer

10

Answer

5

Answer

2

Question 7

Element X has this electron configuration: 1s2 2s2 2p6 3s2 3p4;to what group and period does this element belong?

Accepted Answer

Group 6A Period 3

Answer

Group 4A Period 3

Answer

Group 3A Period 4

Answer

Group 6B Period 4

Question 8

An element belongs to group 7A and period 4 in the periodic table. Which of the following characteristics best describes this element?

Accepted Answer

has 7 valence electrons and 4 main energy levels

Answer

a metal

Answer

can form -2 ion

Answer

has 4 valence electrons and 7 main energy levels

Question 9

Which pair of elements will form ionic bond?

Accepted Answer

metal to nonmetal

Answer

metal to metal

Answer

nonmetal to nonmetal

Answer

metal to metalloid

Question 10

Phosphorus belongs to group 5A while chlorine belongs to group 7A. What bond is formed when P and Cl combine?

Accepted Answer

Nonpolar covalent

Answer

Ionic

Answer

Metallic

Answer

Polar covalent

Question 11

Which of the following statements will NOT be true when sodium (atomic number11) atom loses one electron? Sodium atom will

Accepted Answer

have a -1 oxidation number

Answer

be isoelectronic with Neon

Answer

have 10 electrons and 11 protons

Answer

have a +1 oxidation number

Question 12

When does covalent bonding take place?

Accepted Answer

It takes place when atoms share electrons with one another.

Answer

It takes place when atoms attain stability.

Answer

It takes place when atoms collide with one another.

Answer

It takes place when the attraction between atoms is strong

Question 13

When does ionic bonding take place?

Accepted Answer

It takes place after two or more atoms loss or gain electrons to form an ion

Answer

It takes place when atoms share electrons with one another.

Answer

It takes place when the attraction between atoms is strong

Answer

It takes place when atoms collide with one another.

Question 14

Which among the following shows that an atom is stable?

Accepted Answer

having 8 valence electrons

Answer

having 4 valence electrons

Answer

having 6 valence electrons

Answer

having 2 valence electrons

Question 15

For questions 15-18 refer to the chemical reaction between Calcium and Fluorine:

Which of the following correctly represents the chemical formula formed between Calcium and fluorine?

Accepted Answer

Ca2F7

Answer

CaF

Answer

CaF2

Answer

Ca2F

Question 16

For questions 15-18 refer to the chemical reaction between Calcium and Fluorine: What charge is formed by Calcium?

Accepted Answer

+2

Answer

+1

Answer

-1

Answer

-2

Question 17

For questions 15-18 refer to the chemical reaction between Calcium and Fluorine: What charge is formed by Fluorine?

Accepted Answer

-1

Answer

+1

Answer

+2

Answer

-2

Question 18

For questions 15-18 refer to the chemical reaction between Calcium and Fluorine: What kind of chemical bond is formed from the combination of Ca and F?

Accepted Answer

Ionic

Answer

Covalent

Answer

Metallic

Answer

Organic

Question 19

Which of the following statements best describe organic compounds?

Accepted Answer

Organic compounds are composed mainly of carbon and hydrogen

Answer

Organic compounds are compounds that are produced byliving things

Answer

Organic compounds are compounds that contain carbon atoms only

Answer

Organic compounds are compounds that contain carbon and oxygen only

Question 20

How do carbon atoms form many organic compounds?

Accepted Answer

By forming many bonds with other carbon atoms and other elements

Answer

By sharing their electrons with other metal and non-metal elements

Answer

By transferring their electrons to the atoms of surrounding elements

Answer

By attracting other elements toward themselves to form the bonds

Question 21

What is the maximum number of bonds can a carbon atom form?

Accepted Answer

4

Answer

3

Answer

2

Answer

5

Question 22

Which of the following is an organic compound?

Accepted Answer

C₈H₁₈

Answer

NaHCO3

Answer

CaCO3

Answer

CO2

Question 23

What is the correct name of this hydrocarbon, C₄H₁₀?

Accepted Answer

butane

Answer

butyne

Answer

butene

Answer

propane

Question 24

Which organic compound is used as a cleaning agent?

Accepted Answer

ethyl alcohol

Answer

gasoline

Answer

liquefied petroleum gas (LPG)

Answer

kerosene

Question 25

Which of the following molecular formula has a molar mass of 180 g/mole?

Accepted Answer

C₆H₁₂O₆

Answer

C₁₂H₂₂O₁₁

Answer

C3H8

Answer

C6H5OH

Question 26

Water,H₂O, has a molecular mass of 18 g/mole. How many moles are there in36 g of water?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 27

An Avogadro’s number of any element is equivalent to

Accepted Answer

6.022 x 10²³ particles

Answer

the atomic number of that element.

Answer

12g of that element

Answer

the mass number of that element.

Question 28

For numbers 28-30, refer to the chemical formula of ammonia, NH₃. ( atomic mass H=1 N=14 )

What is the molar mass of NH₃?

Accepted Answer

17 g/mole

Answer

16 g/mole

Answer

10 g/mole

Answer

15 g/mole

Question 29

What is the percentage composition of nitrogen in NH₃?

Accepted Answer

82.35%

Answer

17.65%

Answer

10%

Answer

50%

Question 30

What is the percentage composition of hydrogen in NH₃?

Accepted Answer

17.65%

Answer

82.35%

Answer

10%

Answer

50%

Related quizzes

Related quizzes