Atoms Molecules and Ions
One carbon atom and one oxygen atom are combined together to form a molecule of
oxygen
water
carbon dioxide
carbon monoxide
carbon monoxide
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The smallest particle of an atom which exists, is calledA. matter
B. atom
C. proton
D. electron
The diameter of a ‘nucleus’ is
A. 0.00001nm
B. 1nm
C. 0.1nm
D. 0.01nm
A silver pendant is made up of atoms of
A. silver
B. gold
C. platinum
D. metals
Neutrons carry
A. positive charge
B. negative charge
C. neutral charge
D. no charge
A modern model of an atom shows that electrons are present outside nucleus in the region of high
A. probability
B. velocity
C. speed
D. energy level
Rutherford’s Model explains that atom has a nucleus which is surrounded by
A. protons
B. electrons
C. neutrons
D. nuclear energy
In nucleus, mass of an atom is more than
A. 0.9994
B. 0.9499
C. 0.9949
D. 0.4999
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