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Question
Multiple Choice Questions
The sum of number of protons and number of neutrons present in the nucleus of an atom is called its
Options
mass number
atomic number
number of electrons
all of the above
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Solution
mass number
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RELATED QUESTIONS
If number of electrons in an atom is 8 and number of protons is also 8, then
- What is the atomic number of the atom? and
- What is the charge on the atom?
Explain the Atomic number with example.
Tick the most appropriate answer.
Which of these have similar chemical properties but different set of physical properties and mass number?
- isobars
- elements
- isotopes
- none of these
Name the particles which actually determine the mass of an atom.
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Argon – \[\ce{^40_18Ar}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Silicon [At. no. = 14, Mass no. = 28]
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Isotopes of hydrogen [11H, 21H, 31H]
What is a neutron?
______ = No. of protons = No. of the electrons.
K and L shells can accommodate a maximum of 2 and 8 electrons respectively.
