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प्रश्न
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Lithium [At. no. = 3, Mass no. = 7]
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उत्तर
Structure of atoms:
Z is Atomic Number A is the mass number
Lithium \[\ce{^7_3Li}\]
Z = 3 = p = e
K L
e = 3 = 2, 1
A = p + n
7 = 3 + 3
∴ n = 7 − 3 = 4
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संबंधित प्रश्न
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Multiple Choice Questions
If the atomic number of an atom is 17 and mass number is 35 then number of neutron will be
State the mass number, the atomic number, number of neutrons and electronic configuration of the following atoms.
`""^12""_6C, ""^16""_8O, ""^19""_9F, ""^20""_10Ne, ""_13""Al""^27, ""_17""Cl""^35`
Also, draw atomic diagrams for them.
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TRUE \ FALSE
After the emission of a beta-particle, the atomic number of the atom increases by one.
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
Name or state the following:
Elements having same mass number but different atomic number
State the main postulates of Dalton’s atomic theory.
What is atomic number?
Compare the charge and mass of protons and electrons.
