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प्रश्न
Write true or false for the following statement
An atom on the whole has a positive charge.
पर्याय
True
False
उत्तर
false
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संबंधित प्रश्न
WRITE SHORT ANSWER
Define the atomic mass number of an atom.
The number of electrons in the atom of an element X is 15 and the number of neutrons is 16. Which of the following is the correct representation of an atom of this element ?
Match the atomic numbers 4,8,10,15 and 19 with each of the following:
An element which does not form ion
Elements X, Y and Z have atomic numbers 6,9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
An element ‘A’ has mass number 23 and atomic number 11. State the –
- no. of neutrons in its shell,
- electronic configuration of the element ‘A’.
Differentiate mass number from atomic number.
Which of the following are true for an element?
- Atomic number = number of protons + number of electrons
- Mass number = number of protons + number of neutrons
- Atomic mass = number of protons = number of neutrons
- Atomic number = number of protons = number of electrons
If an atom has 6 electrons in its outermost shell, it is inert.
What are the letters A, Z, and X stand for?
State the term for the following:
The amount of substance which contains the same number of units as the number of atoms in carbon-12.
