Chem – Chapter 8: Periodic Table and Periodicity

1

Elements in the same group of the periodic table have the same number of:

A Neutrons B Valence electrons C Protons D Shells

2

Alkali metals react with water to produce:

A Hydrogen gas and an alkali B Oxygen gas and an acid C Chlorine gas and a salt D Carbon dioxide gas and water

3

Which property generally decreases as you move from left to right across a period in the periodic table?

A Atomic size B Ionisation energy C Electronegativity D Non-metallic character

4

Which of the following elements is a noble gas?

A Hydrogen B Oxygen C Neon D Nitrogen

5

The most reactive metals are found in which group of the periodic table?

A Group 1 B Group 2 C Group 17 D Group 18

6

Which of the following is a noble gas?

A Fluorine B Nitrogen C Neon D Oxygen

7

Which scientist arranged elements in the modern periodic table based on atomic number?

A Mendeleev B Moseley C Dalton D Rutherford

8

Which halogen is the most reactive?

A Fluorine B Chlorine C Bromine D Iodine

9

The tendency of an atom to attract shared electrons in a chemical bond is called:

A Ionization energy B Electronegativity C Electron affinity D Atomic radius

10

Why do elements in the same group show similar chemical properties?

A They have the same number of shells. B They have the same number of valence electrons. C They have the same atomic mass. D They have the same number of neutrons.

11

As we move down a group, atomic size:

A Increases B Decreases C Remains the same D First increases then decreases

12

Mendeleev arranged the elements in order of increasing:

A atomic number B atomic mass C valency D electronegativity

13

What is the trend of atomic size across a period from left to right?

A Atomic size increases B Atomic size decreases C Atomic size remains the same D Atomic size first increases then decreases

14

Moseley improved the periodic table by arranging elements according to:

A Atomic mass B Atomic number C Valence electrons D Density

15

The metallic character of elements generally decreases as we move:

A From left to right across a period B From right to left across a period C From top to bottom in a group D From bottom to top in a group

16

Which of the following is the most reactive non-metal?

A Chlorine B Fluorine C Bromine D Iodine

17

Electron affinity generally ______ across a period from left to right.

A decreases B increases C remains unchanged D becomes zero

18

Which of the following statements about the modern periodic table is correct?

A It has 18 periods and 7 groups. B It has 7 periods and 18 groups. C It has 8 periods and 18 groups. D It has 7 periods and 8 groups.

19

Which of the following halogens is the most reactive?

A Fluorine B Chlorine C Bromine D Iodine

20

جدید جدولِ دوری کا کون سا گروپ نوبل گیسیں رکھتا ہے؟

A گروپ 1 B گروپ 2 C گروپ 17 D گروپ 18

21

Which element is placed in the f-block of the periodic table?

A Iron B Uranium C Calcium D Chlorine

22

As we move down a group in the periodic table, the atomic size generally:

A Increases B Decreases C Remains the same D First decreases then increases

23

The modern periodic table has how many periods?

A Eighteen B Seven C Eight D Five

24

Elements in the same group of the periodic table have similar chemical properties because they have the same:

A Number of shells B Number of valence electrons C Atomic mass D Number of neutrons

25

Metallic character increases as we move:

A From left to right in a period B From top to bottom in a group C From right to left in a period D From bottom to top in a group