Periodic Table: Explore Elements and Their Properties

Question 1

Which of the following elements is the most reactive in single-replacement reactions?

Accepted Answer

Sodium

Answer

Aluminum

Answer

Iron

Answer

Copper

Question 2

What is the electron configuration of the element in Period 3, Group 15?

Accepted Answer

[Ar] 3s² 3p⁵

Answer

[Ne] 3s² 3p³

Answer

[Ne] 4s² 4p³

Answer

[Ar] 4s² 4p⁵

Question 3

Which of the following statements best describes a characteristic of elements in the same group of the Periodic Table?

Accepted Answer

They have the same number of valence electrons.

Answer

They have the same number of electron shells.

Answer

They have the same physical state at room temperature.

Answer

They have the same atomic mass.

Question 4

Which of the following elements is classified as a non-metal?

Accepted Answer

Chlorine

Answer

Sodium

Answer

Calcium

Answer

Iron

Question 5

The IUPAC name for the element with the symbol 'Au' is:

Accepted Answer

Gold

Answer

Aurum

Answer

Aurium

Answer

Auri

Question 6

As you move from left to right across a period of the Periodic Table, what happens to the atomic radius?

Accepted Answer

Decreases

Answer

Increases

Answer

Stays the same

Answer

Can either increase or decrease

Question 7

What periodic trend describes the gradual increase in ionization energy as you move across a period from left to right?

Accepted Answer

Ionization energy

Answer

Electronegativity

Answer

Atomic radius

Answer

Electron affinity

Question 8

Which group in the periodic table contains elements that are known for their ability to form strong acids?

Accepted Answer

Group 17

Answer

Group 1

Answer

Group 15

Answer

Group 16

Question 9

Which of the following elements is a metalloid?

Accepted Answer

Arsenic

Answer

Bromine

Answer

Krypton

Answer

Rubidium

Question 10

Which of the following statements about the periodic table is incorrect?

Accepted Answer

The periodic table is only useful for predicting the properties of metals

Answer

Elements with similar chemical properties are grouped together

Answer

The periodic table is divided into 18 vertical columns called groups

Answer

The periodic table is a dynamic tool that is constantly being updated

Question 11

Which of the following elements is most likely to form acidic oxides?

Accepted Answer

Sulfur

Answer

Potassium

Answer

Sodium

Answer

Magnesium

Question 12

Moving down a group in the Periodic Table, which trend is observed?

Accepted Answer

Increasing atomic radius

Answer

Decreasing ionization energy

Answer

Increasing electronegativity

Answer

Decreasing metallic character

Question 13

Which of the following is not classified as a noble gas?

Accepted Answer

Oxygen

Answer

Helium

Answer

Neon

Answer

Argon

Question 14

Which element has the highest electronegativity?

Accepted Answer

Fluorine

Answer

Sodium

Answer

Nitrogen

Answer

Chlorine

Question 15

Which element exhibits the most metallic character?

Accepted Answer

Potassium

Answer

Calcium

Answer

Iron

Answer

Copper

Question 16

Identify the element likely to form covalent bonds:

Accepted Answer

Nitrogen

Answer

Sodium

Answer

Chlorine

Answer

Magnesium

Question 17

Which of the following is a metalloid?

Accepted Answer

Silicon

Answer

Aluminum

Answer

Potassium

Answer

Calcium

Question 18

The element with the greatest atomic number is:

Accepted Answer

Oganesson

Answer

Hydrogen

Answer

Fluorine

Answer

Sodium

Question 19

The element with the lowest ionization energy is:

Accepted Answer

Sodium

Answer

Potassium

Answer

Fluorine

Answer

Chlorine

Question 20

Which of the following groups contains only non-metals?

Accepted Answer

Group 18

Answer

Group 1

Answer

Group 15

Answer

Group 2

Question 21

What is the atomic number of the element in period 3, group 15?

Accepted Answer

35

Answer

15

Answer

55

Answer

75

Question 22

What is the oxidation state of sulfur in sulfuric acid (H₂SO₄)?

Accepted Answer

+6

Answer

+2

Answer

+4

Answer

+8

Question 23

Which of the following is a noble gas element?

Accepted Answer

Helium

Answer

Oxygen

Answer

Magnesium

Answer

Chlorine

Question 24

Which element is most likely to form an ionic bond?

Accepted Answer

Sodium

Answer

Carbon

Answer

Oxygen

Answer

Nitrogen

Question 25

Which of the following reactions is a redox reaction?

Accepted Answer

CuO + H₂ → Cu + H₂O

Answer

2Na + Cl₂ → 2NaCl

Answer

2HCl + CaCO₃ → CaCl₂ + H₂O + CO₂

Answer

NaOH + HCl → NaCl + H₂O

Question 26

What is the hybridization of the central atom in the methane (CH₄) molecule?

Accepted Answer

sp³

Answer

sp

Answer

sp²

Answer

sp³d

Question 27

Which group of elements does NOT belong to the main groups in the Periodic Table?

Accepted Answer

Lanthanides

Answer

Alkali metals

Answer

Halogens

Answer

Noble gases

Question 28

What is the atomic number of chlorine?

Accepted Answer

17

Answer

16

Answer

18

Answer

19

Question 29

Which element has the greatest ionization energy?

Accepted Answer

Helium

Answer

Potassium

Answer

Sodium

Answer

Lithium

Question 30

Which property is NOT characteristic of noble gases?

Accepted Answer

Reactive

Answer

Colorless

Answer

Odorless

Answer

Monatomic

Question 31

Which element is categorized as a halogen?

Accepted Answer

Chlorine

Answer

Phosphorus

Answer

Sulfur

Answer

Selenium

Question 32

Which of the following elements matches the description of a transition metal?

Accepted Answer

Iron

Answer

Sodium

Answer

Aluminum

Answer

Calcium

Question 33

Which element exhibits the highest electronegativity?

Accepted Answer

Fluorine

Answer

Chlorine

Answer

Bromine

Answer

Iodine

Question 34

Element 'X' is located in the same group as oxygen in the Periodic Table. Predict the chemical properties of element 'X'.

Accepted Answer

Element 'X' will likely be a non-metal with a high electronegativity.

Answer

Element 'X' will likely be a metal with a low electronegativity.

Answer

Element 'X' will likely be a noble gas with a high ionization energy.

Answer

Element 'X' will likely be a metalloid with a variable oxidation state.

Question 35

Which substance qualifies as a noble gas?

Accepted Answer

Helium

Answer

Oxygen

Answer

Sodium

Answer

Chlorine

Question 36

Which metal exhibits the highest reactivity?

Accepted Answer

Potassium

Answer

Calcium

Answer

Iron

Answer

Gold

Question 37

Which statement accurately describes the Periodic Table's organization principle?

Accepted Answer

Elements are arranged in ascending atomic number.

Answer

Elements are arranged in order of increasing density.

Answer

Elements are arranged in descending atomic mass.

Question 38

Identify the noble gas from the following elements:

Accepted Answer

Neon

Answer

Potassium

Answer

Sodium

Answer

Chlorine

Question 39

Which period of the Periodic Table contains the element with the greatest atomic number?

Accepted Answer

Period 7

Answer

Period 2

Answer

Period 4

Answer

Period 6

Question 40

Identify the element with the smallest atomic radius:

Accepted Answer

Helium

Answer

Lithium

Answer

Sodium

Answer

Fluorine

Question 41

Which element is classified as a metal?

Accepted Answer

Iron

Answer

Chlorine

Answer

Carbon

Answer

Oxygen

Question 42

Identify the halogen from the following elements:

Accepted Answer

Fluorine

Answer

Magnesium

Answer

Sodium

Answer

Aluminum

Question 43

Which element exhibits the highest electronegativity?

Accepted Answer

Fluorine

Answer

Chlorine

Answer

Iodine

Answer

Bromine

Question 44

Identify the noble gas from the following elements.

Accepted Answer

Helium

Answer

Chlorine

Answer

Potassium

Answer

Sodium

Question 45

Which element has an atomic number of 14, as indicated by the symbol 'Si'?

Accepted Answer

Silicon

Answer

Nitrogen

Answer

Oxygen

Answer

Carbon

Question 46

Which element exhibits the highest electronegativity?

Accepted Answer

Fluorine

Answer

Nitrogen

Answer

Oxygen

Answer

Chlorine

Question 47

Name the periodic trend that explains the decrease in atomic radius when moving from left to right across a period.

Accepted Answer

Increasing Effective Nuclear Charge

Answer

Decreasing Atomic Mass

Answer

Increasing Electronegativity

Answer

Decreasing Ionization Energy

Question 48

Which of the following elements is not classified as a metalloid?

Accepted Answer

Sulfur

Answer

Boron

Answer

Germanium

Answer

Silicon

Question 49

Identify the element that exists as a liquid at room temperature.

Accepted Answer

Bromine

Answer

Iodine

Answer

Fluorine

Answer

Chlorine

Question 50

Which element exhibits radioactive properties?

Accepted Answer

Uranium

Answer

Iron

Answer

Gold

Answer

Aluminum

Question 51

What are the vertical columns in the periodic table called?

Accepted Answer

Groups

Answer

Periods