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Question
Give the following a suitable word/phrase.
Atoms of same element with same atomic number but a different mass number.
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Solution
Isotopes
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An ion which has a positive charge is called a ..................
Multiple Choice Questions
The sub atomic particle with negative charge is
Fill in the blank of the following statement :
The total number of protons and neutrons in the nucleus of an atom is called its _________.
From the symbol `""_2^4"He"` for the element helium, write down the mass number and the atomic number of the element.
An element A atomic number 7 mass numbers 14
B electronic configuration 2,8,8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E Electronic configuration 2,8,8,1
State Valency of each element
An element A atomic number 7 mass numbers 14
B electronic configuration 2,8,8
C electrons 13, neutrons 14
D Protons 18 neutrons 22
E Electronic configuration 2,8,8,1
State (i) Valency of each element (ii) which one is a metal (iii) which is non-metal (iv) which is an inert gas
Define the term ‘atomic number’ of an atom.
State why the atomic weight of an element is also termed relative atomic mass.
Atomic number : ______ :: Mass number : Number of protons and neutrons.
The elementary particles such as protons and neutrons are collectively called ______.
In which one of the following, the number of protons is greater than the number of neutrons but number of protons is less than the number of electrons?
