Periodic Table Quizzes: Test Your Knowledge of Elements and Chemistry

Question 1

Identify the noble gas element among the following:

Accepted Answer

Argon

Answer

Chlorine

Answer

Sodium

Answer

Potassium

Question 2

Explain the trend observed in atomic radius as we move down a group in the Periodic Table.

Accepted Answer

Increases

Answer

Decreases

Answer

Remains constant

Answer

Alternates

Question 3

Identify the property that is NOT characteristic of metals:

Accepted Answer

Brittle

Answer

Good conductors of electricity

Answer

High melting point

Answer

Malleable

Question 4

Identify the element classified as a metalloid:

Accepted Answer

Silicon

Answer

Oxygen

Answer

Aluminium

Answer

Iron

Question 5

How does an element's electron configuration determine its position in the Periodic Table?

Accepted Answer

It determines the element's group and period.

Answer

It reveals the element's atomic mass and number of neutrons.

Answer

It indicates the element's chemical reactivity and stability.

Question 6

Which element is a metalloid?

Accepted Answer

C. Silicon

Answer

A. Sodium

Answer

B. Chlorine

Answer

D. Calcium

Question 7

Which of the following elements is classified as a metalloid?

Accepted Answer

Boron

Answer

Lithium

Answer

Nitrogen

Answer

Sodium

Question 8

Find the atomic number of chlorine.

Accepted Answer

17

Answer

15

Answer

19

Answer

21

Question 9

Identify the type of chemical bond formed between sodium and chlorine.

Accepted Answer

Ionic bond

Answer

Covalent bond

Answer

Metallic bond

Answer

Hydrogen bond

Question 10

Provide the name of the element represented by the symbol Cu.

Accepted Answer

Copper

Answer

Carbon

Answer

Chlorine

Answer

Calcium

Question 11

Identify the group of elements that are classified as noble gases.

Accepted Answer

Group 18

Answer

Group 1

Answer

Group 17

Answer

Group 2

Question 12

Establish the chemical formula for sulfuric acid.

Accepted Answer

H₂SO₄

Answer

HCl

Answer

HNO₃

Answer

NH₃

Question 13

Classify the following element: Iron.

Accepted Answer

Transition Metal

Answer

Metalloid

Answer

Alkali Metal

Answer

Noble Gas

Question 14

Calculate the molar mass of sodium chloride (NaCl).

Accepted Answer

58.5 g/mol

Answer

23 g/mol

Answer

35.5 g/mol

Answer

71 g/mol

Question 15

Which of the following elements belongs to Group 18 (Noble Gases) of the Periodic Table?

Accepted Answer

Argon

Answer

Sodium

Answer

Chlorine

Answer

Iron

Question 16

The atomic number of an element is equal to the number of:

Accepted Answer

Protons

Answer

Neutrons

Answer

Electrons

Answer

Protons and Electrons

Question 17

Which of the following substances has the strongest intermolecular forces, resulting in the highest boiling point?

Accepted Answer

Water

Answer

Hydrogen chloride

Answer

Methane

Answer

Carbon dioxide

Question 18

Which of the following substances can act as both an acid and a base?

Accepted Answer

Water

Answer

Sodium hydroxide

Answer

Hydrochloric acid

Answer

Sodium chloride

Question 19

The atomic number of an element corresponds to its:

Accepted Answer

Number of protons

Answer

Number of electrons

Answer

Number of neutrons

Answer

Number of isotopes

Question 20

The reactivity of metals generally:

Accepted Answer

Increases down a group

Answer

Increases across a period

Answer

Decreases down a group

Answer

Decreases across a period

Question 21

Which type of chemical bond is formed by the transfer of electrons?

Accepted Answer

Ionic bond

Answer

Covalent bond

Answer

Metallic bond

Answer

Hydrogen bond

Question 22

Which of the following compounds is formed by the reaction of a metal and a non-metal?

Accepted Answer

Sodium chloride

Answer

Carbon dioxide

Answer

Water

Answer

Methane

Question 23

In most compounds, the oxidation number of oxygen is:

Accepted Answer

-1

Answer

+1

Answer

-2

Answer

+2

Question 24

Identify the element with an atomic number of 17.

Accepted Answer

Chlorine (Cl)

Answer

Bromine (Br)

Answer

Iodine (I)

Answer

Fluorine (F)

Question 25

Which of the following elements is classified as a transition metal?

Accepted Answer

Iron (Fe)

Answer

Sodium (Na)

Answer

Chlorine (Cl)

Answer

Oxygen (O)

Question 26

Determine the electronic configuration of the element represented by the symbol 'Ne'.

Accepted Answer

1s2 2s2 2p6

Answer

1s2 2s2 2p4

Answer

1s2 2s2 2p5

Answer

1s2 2s2

Question 27

Which of the given elements belongs to the group of alkali metals?

Accepted Answer

Sodium (Na)

Answer

Calcium (Ca)

Answer

Aluminium (Al)

Answer

Copper (Cu)

Question 28

Describe the general trend in atomic radius as you move from left to right across a period in the periodic table.

Accepted Answer

Decreases

Answer

Increases

Answer

Stays the same

Answer

Varies unpredictably

Question 29

Determine the oxidation number of chlorine in the compound HCl.

Accepted Answer

-1

Answer

0

Answer

+1

Answer

+7

Question 30

Which of these statements about the reactivity of elements in the periodic table is correct?

Accepted Answer

Elements in the same group tend to have similar reactivity.

Answer

Elements in the same period tend to have similar reactivity.

Answer

The most reactive elements are in the noble gas group.

Question 31

Which group in the Periodic Table does NOT contain metals?

Accepted Answer

Noble gases

Answer

Alkali metals

Answer

Transition metals

Answer

Metalloids

Question 32

What type of bond is formed when atoms share electrons?

Accepted Answer

Covalent bond

Answer

Ionic bond

Answer

Metallic bond

Answer

Hydrogen bond

Question 33

Which of the following is NOT a physical property of elements?

Accepted Answer

Reactivity

Answer

Density

Answer

Boiling point

Answer

Color

Question 34

Which element is a metalloid?

Accepted Answer

Silicon

Answer

Iron

Answer

Chlorine

Answer

Potassium

Question 35

Which of the following is a transition metal?

Accepted Answer

Zinc

Answer

Sodium

Answer

Fluorine

Answer

Nitrogen

Question 36

Which of the following is a noble gas?

Accepted Answer

Helium

Answer

Oxygen

Answer

Sodium

Answer

Chlorine

Question 37

Which element is a noble gas with the atomic number 2?

Accepted Answer

Helium

Answer

Neon

Answer

Lithium

Answer

Hydrogen

Question 38

Which element has the highest electronegativity value?

Accepted Answer

Fluorine

Answer

Nitrogen

Answer

Chlorine

Answer

Oxygen

Question 39

Which of the following is an ionic compound?

Accepted Answer

Sodium chloride

Answer

Methane

Answer

Carbon dioxide

Answer

Water

Question 40

Which element has the smallest atomic radius?

Accepted Answer

Helium

Answer

Neon

Answer

Krypton

Answer

Argon

Question 41

Which element is the most reactive nonmetal?

Accepted Answer

Fluorine

Answer

Chlorine

Answer

Bromine

Answer

Iodine

Question 42

Which element is a halogen?

Accepted Answer

Chlorine

Answer

Sulfur

Answer

Phosphorus

Answer

Nitrogen

Question 43

Which element is a halogen?

Accepted Answer

Chlorine

Answer

Aluminium

Answer

Sodium

Answer

Potassium

Question 44

What is the atomic number of iron (Fe)?

Accepted Answer

26

Answer

56

Answer

32

Answer

15

Question 45

Which of these elements is a noble gas?

Accepted Answer

Helium

Answer

Carbon

Answer

Chlorine

Answer

Iron

Question 46

What is the name of the group of elements found in Group 1 of the Periodic Table?

Accepted Answer

Alkali metals

Answer

Halogens

Answer

Alkaline earth metals

Answer

Transition metals

Question 47

Which element has the highest electronegativity?

Accepted Answer

Fluorine

Answer

Chlorine

Answer

Oxygen

Answer

Sodium

Question 48

What is the chemical formula for sodium chloride?

Accepted Answer

NaCl

Answer

CaCl2

Answer

KCl

Answer

MgCl2

Question 49

Which of these elements is a metalloid?

Accepted Answer

Silicon

Answer

Gold

Answer

Potassium

Answer

Bromine

Question 50

Who is credited with developing the Periodic Table?

Accepted Answer

Dmitri Mendeleev

Answer

John Dalton

Answer

Ernest Rutherford

Answer

Marie Curie