The electron is (a) α-ray particle (b) β-ray particle (c) Hydrogen ion (d) Positron
The electron is (a) α-ray particle (b) β-ray particle (c) Hydrogen ion (d) Positron Answer: (b) The β-ray particle constitutes electrons.
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Positive ions are formed from the neutral atom by the
Positive ions are formed from the neutral atom by the (a) Increase of nuclear charge (b) Gain of protons (c) Loss of electrons (d) Loss of protons Answer: (c) Positive ions are formed from the neutral atom by the loss of electrons.
The size of nucleus is of the order of
The size of nucleus is of the order of (a) 10^(-12)m (b) 10^(-8) m (c) 10^(-15)m (d) 10^(-10) m Answer: (c) Radius of nucleus ≃10^(-15)m.
The nucleus of the atom consists of
The nucleus of the atom consists of (a) Proton and neutron (b) Proton and electron (c) Neutron and electron (d) Proton, neutron and electron Answer: (a) It consists of proton and neutron and these are also known as nucleons.
A neutral atom (Atomic no. >1 ) consists of
A neutral atom (Atomic no. >1 ) consists of (a) Only protons (b) Neutrons + protons (c) Neutrons + electrons (d) Neutron + proton + electron Answer: (d) Neutrons and protons in the nucleus and electrons in the extranuclear region.
Who discovered neutron (a) James Chadwick (b) William Crooks (c) J.J. Thomson (d) Rutherford
Who discovered neutron (a) James Chadwick (b) William Crooks (c) J.J. Thomson (d) Rutherford Answer: (a) James Chadwick discovered neutron ( 0n^1 ).