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The symbol of the element Einsteinium is Em.
(a)True
(b)False

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Important Questions on Atom, Molecule and Chemical Reaction

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Write the complete symbol for the atom with the given atomic number (Z) and atomic mass (A)

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(a) Cobalt CO
(b) Carbon c
(c) Aluminium AL
(d) Helium He
(e) Sodium So

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Write symbols of the following elements and the radicals obtained from them, and indicate the charge on the radicals.
Mercury, potassium, nitrogen, copper, sulphur, carbon, chlorine, oxygen.

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HARD
Complete the following table:
S. No | Element | Symbol |
1. | Carbon | |
2. | Magnesium | |
3. | Sodium | |
4. | Gold | |
5. | Chlorine | |
6. | Aluminium | |
7. | Copper | |
8. | Hydrogen | |
9. | Potassium | |
10. | Oxygen |






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