Question

V
xvi) Atomic mass or atomic mass number is the total number of
molecules:
present in the
(a) Protons and electrons
(b) Protons and neutrons
(c) Electrons and neutrons
(d) Protons
xvii) The equation that represents a chemical change is:
(a) Ice Water
(b) Water
Steam
Carbon + Oxygen - Carbon dioxide
Water + Common salt Solution of common salt
(d)
in an atom:
xviii) Atomic number (Z) is equal to the number of
(a) Neutron
(b) Electron
(c) Proton
(d) All of these
xix) In which of the following substances its constituents retain their properties?
(a) Atom.
(b) Element.
Compound.
(d) Mixture.
[1]
um
xx) The electrically charged particle formed either by the loss or gain of electrons,
such that the valence shell of the particles has a structure like that of nearest noble
gas is:
, 8,
Ton
(a)
(b)
(c)
(d)
Proton
Electron
lon
Cation​

Answer 1

1. proton and Neutron
2. ço2+ 02
3. electron
4. element
5. ion

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