Class X

The phenomenon by which radiations split matter into negative and positive ions is called
  1. Ionization
  2. Radiation
  3. Radioactivity
  4. Transmutation
In SI base units, 1 Bq is equal to
  1. 1 disintegration per second
  2. 0.01 disintegration per second
  3. 10 disintegration per second
  4. 1.5 disintegration per second
The number of protons in the nucleus is called
  1. Atomic number (Z)
  2. Neutron number (N)
  3. Electron number (E)
  4. Atomic mass number (A)
Alpha (α) particles are helium (He) nucleus with a charge of
  1. e
  2. 2e
  3. 3e
  4. 4e
The word atom is derived from the Greek word
  1. Atomis
  2. Optium
  3. Otomos
  4. Antimum
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