Atoms MCQs with Answers

The force of attraction between the atoms of helium is?

• A.Ionic bond
• B.Covalent bond
• C.London dispersion force
• D.Hydrogen bond

Neutron is ?

• A.Positively charged
• B.Negatively charged
• C.Neutral
• D.Both positively and negatively charged

The total energy of a hydrogen atom in its ground state is?

• A.Positive
• B.Zero
• C.Negative
• D.Infinite

Moving left to right across a period, the value of electronegativity (E.N) is ?

• A.Decreased
• B.Increased
• C.Remains constant
• D.First increases then decreases

Principal quantum number determines how far from the nucleus the _ is to be found.

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

What is the atomic number of carbon?

• A.4
• B.8
• C.6
• D.12

The nucleus of an atom consists of?

• A.Electrons and protons
• B.Protons and neutrons
• C.Electrons and neutrons
• D.Electrons, protons, and neutrons

After the discovery of atomic number, scientists noted that atomic number can be used to arrange elements in a systematic way. The atomic number was discovered by _?

• A.Dmitri Mendeleev
• B.Henry Moseley
• C.John Dalton
• D.Niels Bohr

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

• A.1 proton and 0 neutron
• B.1 proton and 1 neutron
• C.2 protons and 1 neutron
• D.1 proton and 2 neutrons

The valency of carbon is ?

• A.2
• B.8
• C.6
• D.4