Live Education Quiz

1

Who discovered the neutron?

A Rutherford B Chadwick C Bohr D Thomson

2

Which particle determines the identity of an element?

A Electron B Neutron C Proton D Nucleus

3

The maximum number of electrons in the second shell is:

A 2 B 4 C 6 D 8

4

Which shell is closest to the nucleus?

A K B L C M D N

5

The region of high probability of finding an electron is called:

A Orbit B Shell C Orbital D Nucleus

6

Atomic number is equal to the number of:

A Neutrons B Protons C Electrons and neutrons D Protons and neutrons

7

Which subshell has spherical shape?

A p B d C f D s

8

Bohr’s model explains:

A Chemical bonding only B Atomic nucleus C Electron arrangement in shells D Neutron behavior

9

Mass number is the total number of:

A Electrons and protons B Protons only C Protons and neutrons D Neutrons only

10

The nucleus of an atom contains:

A Only electrons B Protons and neutrons C Only neutrons D Only protons

11

Which formula is used to find maximum electrons in a shell?

A n + 2 B 2n C 2n² D n²

12

If an atom has atomic number 11, how many protons does it have?

A 10 B 11 C 12 D 22

13

Isotopes have the same:

A Mass number B Number of neutrons C Atomic number D Physical properties

14

The outermost shell of an atom is called:

A K shell B Valence shell C L shell D Nucleus

15

According to modern atomic theory, electrons behave as:

A Particles only B Waves only C Particles and waves D Rays

16

The smallest particle of an element that retains its properties is:

A Molecule B Atom C Ion D Electron

17

Valence electrons determine:

A Mass number B Atomic number C Chemical properties D Nuclear stability

18

The electronic configuration shows:

A Arrangement of neutrons B Arrangement of protons C Arrangement of electrons D Arrangement of nucleus

19

Which concept explains why atoms are stable?

A Mass number B Fixed energy levels C Random motion D Nuclear charge

20

The maximum number of electrons in the first shell is:

A 2 B 4 C 6 D 8

21

Particles of matter are always in:

A Rest B Motion C Sleep D Vacuum

22

Which model replaced the idea of fixed electron paths?

A Bohr model B Dalton model C Quantum mechanical model D Rutherford model

23

Which subatomic particle has a negative charge?

A Proton B Neutron C Electron D Nucleus

24

The d-subshell can hold a maximum of:

A 2 electrons B 6 electrons C 10 electrons D 14 electrons

25

Who discovered the electron?

A Rutherford B Dalton C J.J. Thomson D Bohr

26

Which of the following is an isotope of hydrogen?

A Oxygen B Deuterium C Helium D Carbon

27

The modern atomic model is based on:

A Bohr theory only B Quantum mechanics C Dalton theory D Rutherford theory

28

Which statement is true about electrons?

A They are present in nucleus B They have mass equal to proton C They revolve around nucleus D They have positive charge

29

The mass of an atom is mainly due to:

A Electrons B Protons only C Neutrons only D Protons and neutrons

30

The p-subshell can hold a maximum of: