Atoms MCQs with Answers

According to Moseley, the chemical properties of elements are the periodic function of their?

• A.Number of Neutrons
• B.Atomic Mass
• C.Mass Number
• D.Atomic Number

The number of neutron(s) in Protium is ?

• A.0
• B.1
• C.2
• D.3

Ions are charged particles of atoms and form negative and positive charges due to ?

• A.Loss or gain of protons
• B.Sharing of protons and neutrons
• C.Loss or gain of neutrons
• D.Loss or gain of electrons

Mass number of an atom shows _?

• A.Number of protons and neutrons
• B.Number of protons and electrons
• C.Number of neutrons and electrons
• D.Number of protons only

1 Atomic Mass Unit is equal to ?

• A.1.66 × 10⁻²⁴ g
• B.1.66 × 10⁻²⁸ g
• C.1.66 × 10⁻³¹ g
• D.1.66 × 10⁻²⁷ kg

The sub atomic particle, which is positively charged particle?

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

All elements are made up of small indivisible, indestructible particles called atoms. This idea was given by _?

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

Which one of the following is an anion?

• A.H⁻
• B.Na⁺
• C.Ca²⁺
• D.K⁺

Isotopes have the same ?

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

The neutral atoms of all of the isotopes of the same element have _?

• A.Different number of protons
• B.An exact number of protons
• C.Different number of electrons
• D.An exact number of neutrons