Atoms MCQs with Answers

For n = 3, l = 2, which orbital is it?

• A.3s
• B.3p
• C.3d
• D.3f

The potential through which an electron should be accelerated, so that, on collision it can lift the electron in the atom from its ground state to some higher state is known as?

• A.Threshold potential
• B.Ionization potential
• C.Stopping potential
• D.Excitation potential

Which of the following electronic configuration is correct for carbon?

• A.1s²2s²2p²
• B.1s²2s¹2p³
• C.1s²2s²2p¹3s¹
• D.1s²2s²2p³

How many sub-shells are present in an L shell?

• A.Two
• B.One
• C.Three
• D.Four

Which of the following atoms has the greatest tendency to capture an additional electron?

• A.F
• B.Cl
• C.Br
• D.I

Past Paper MCQ

Which of the following is a neutral particle?

• A.Proton
• B.Electron
• C.Neutron
• D.Positron

Electron pairs which are not shared by atoms are called?

• A.Lone pairs
• B.Bond pairs
• C.Valence electrons
• D.Core electrons

How many protons and neutrons are present in the nucleus of Tritium isotope?

• A.1 proton and 2 neutrons
• B.2 protons and 1 neutron
• C.1 proton and 1 neutron
• D.2 protons and 2 neutrons

After emission of beta particle, thorium is transformed into _?

• A.Actinium
• B.Uranium
• C.Radium
• D.Protactinium

How many times is a proton heavier than an electron?

• A.1826
• B.1840
• C.1836
• D.1830