Worksheetsatomic structure
Total questions: 5
Worksheet time: 3mins
Name
Class
Date
1.
It is the number of _______________ present within the nucleus, which distinguish atoms of one element from the other element.
a)
electrons
b)
neutrons
c)
protons
2.
A large number of pure substances exists as clusters of _____________.
a)
molecules
b)
atoms
c)
compounds
3.
What is the ration of time periods (T1/T2) in second orbit of hydrogen atom to third orbit of He+ ion?
a)
8/27
b)
32/27
c)
27/32
d)
None of These
4.
The atomic number for Oxygen is 8, so
a)
there are 8 protons in the atom
b)
the atomic mass is less than 8
c)
the mass of the atom is 8
d)
there are 8 electrons
5.
Protons are...
a)
Negatively charged particles
b)
Positively charged particles
c)
They have no charge
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