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Gen Chem Lec Prelim Mastery Exam

Total questions: 40

Worksheet time: 44mins

Name
Class
Date
1.

This subatomic particle has the smallest mass among all the subatomic particles inside the atom.

a)

Neutron

b)

Proton

c)

Electron

d)

Nucleon

2.

Determining the number of electrons in an atom can be done by identifying the number of _________ in an atom.

a)

Protons + Electrons

b)

Mass number - Atomic number

c)

Protons

d)

Protons + neutrons

3.

6C12 , 6C13 , 6C14 are examples of :

a)

Isotones

b)

Isotopes

c)

Isobars

d)

Isosteres

4.

He was the one who disproved JJ Thompson's atomic theoric

a)

John Dalton

b)

Niels Bohr

c)

Ernest Rutherford

d)

Erwin Schrodinger

5.

Mr. Rutherford proposed what atomic theory/model?

a)

Plum pudding Model

b)

Nuclear model

c)

Planetary model

d)

Raisin bread theory

6.

The outer (extranuclear) region of an atom contains all of the electrons. Electrons are responsible for the physical properties of an atom.

a)

Only the 1st statement is CORRECT

b)

Only the 2nd statement is CORRECT

c)

Both statements are CORRECT

d)

Both statements are INCORRECT

7.

How many electrons are present if the number of neutrons is 12 and the A is 36?

a)

12

b)

24

c)

6

d)

36

8.

What is the atomic number if the A is 45 and the number of electrons 20?

a)

45

b)

25

c)

20

d)

15

9.

These are different elements with the same number of neutrons.

a)

Isotones

b)

Isomer

c)

Isobars

d)

Isotopes

10.

The nucleus contains

a)

Electron and protons

b)

Neutron and electrons

c)

Protons only

d)

Protons and neutrons

11.

JJ Thompson developed the Quantum Mechanical Model. Democritus developed the Planetary model.

a)

All statements are CORRECT

b)

Only the first statement is is INCORRECT

c)

All statements are INCORRECT

d)

Only the first statement is CORRECT

12.

What is the mass of an atom with an electron number of 13 and proton number of 13

a)

13

b)

26

c)

0

d)

Cannot be determined

13.

An atom is a sphere of (+) particles to which are embedded (-) particles. This theory pertains to:

a)

Plum pudding model

b)

Planetary model

c)

Gold film Experiment

d)

Nuclear model

14.

Calculate the elemental atomic mass of Mg if the naturally occurring isotopes; 24Mg, 25Mg, and 26Mg have isotopic abundance of 78.70%, 10.13%, and 11.17% respectively.

a)

34.25 amu

b)

24.32 amu

c)

27.35 amu

d)

38.20 amu

15.

He classified some elements into groups of three, which he called triads

a)

John Newlands

b)

Johann Dobereiner

c)

Dmitri Mendeleev

d)

Henry Mosely

16.

He suggested that elements be arranged in "octaves"

a)

Dmitri Mendeleev

b)

John Newlands

c)

Henry Mosely

d)

Johann Dobereiner

17.

He suggested the arrangement of the elements by its atomic number

a)

John Newlands

b)

Lothar Meyer

c)

Henry Mosely

d)

Alexandre-Emile Béguyer de Chancourtois

18.

How many periods are there in the periodic Table

a)

18

b)

118

c)

7

d)

8

19.

A period is column of elements in the periodic table. A group is a horizontal row of elements arranged via their atomic number.

a)

All statements are CORRECT

b)

All statements are INCORRECT

c)

Only the 1st statement is INCORRECT

d)

Only the 2nd statement is INCORRECT

20.

He discovered the Phosphorous

a)

Hennig Brand

b)

Aristotle

c)

Democritus

d)

Glenn Seaborg

21.

Group IA is also known as

a)

Alkaline earth metals

b)

Chalcogens

c)

Alkali metals

d)

Noble gases

22.

Group VIIA is also known as

a)

Halogens

b)

Nitrogen group/Pnictogens

c)

Boron group/Icosagens

d)

Alkali metals

23.

Group V is also known as

a)

Crystallogens

b)

Pnictogens

c)

Alkaline earth metals

d)

Noble gases

24.

Magnesium is considered part of what group?

a)

Noble gases

b)

Alkaline earth metals

c)

Crystallogens

d)

Icosagens

25.

Selenium is considered part of what group?

a)

Noble gas

b)

Chalcogens

c)

Crystallogens

d)

Pnictogens

26.

Gallium is considered part of what group?

a)

Crystallogens

b)

Icosagens

c)

Alkali metal

d)

Pnictogens

27.

Bismuth is considered part of what group?

a)

Pnictogens

b)

Icosagens

c)

Noble gases

d)

Halogens

28.

Francium is considered part of what group?

a)

Alkali metals

b)

Halogens

c)

Noble gases

d)

Icosagens

29.

Sulfur is considered part of what group?

a)

Icosagens

b)

Chalcogens

c)

Crystallogens

d)

Alkaline earth metals

30.

Krypton is considered part of what group?

a)

Icosagens

b)

Halogens

c)

Noble gases

d)

Pnictogens

31.

The following elements are considered metalloids, EXCEPT for:

a)

Silicon

b)

Tellurium

c)

Phosphorous

d)

Boron

32.

This is a measure of the amount of space occupied by the sample.

a)

Volume

b)

Mass

c)

Length

d)

Weight

33.

This physical property of matter doesn't depend on the amount of matter present.

a)

Intensive property

b)

Extensive property

34.

A chemical change occurs when.....

a)

The appearance of a substance changed

b)

The identity of a substance changed

c)

Neither the appearance and identity of a substance changed

35.

Gas turns to solid

a)

Deposition

b)

Melting

c)

Sublimation

d)

Freezing

36.

Solid turns to liquid

a)

Melting

b)

Freezing

c)

Sublimation

d)

Deposition

37.

Mass

a)

Extensive property

b)

Intensive property

38.

Color

a)

Extensive property

b)

Intensive property

39.

Air

a)

Mixture

b)

Compound

c)

Element

40.

Water

a)

Element

b)

Compound

c)

Mixture

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