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प्रश्न
Give scientific reason.
Atomic mass number is a whole number.
उत्तर
Atomic mass number is a whole number because it is the sum of numbers of protons and numbers of neutrons present in an atom. Which is present in the form of integers.
संबंधित प्रश्न
Summarize the rules for writing of distribution of electrons in various shells for the first eighteen elements.
What do you understand by the term "electronic configuration" of an element? Write down the electronic configuration of oxygen (At. No. = 8).
The atom of an element X has 7 electrons in its M shell.
(a) Write the electronic configuration of element X.
(b) What is the atomic number of element X?
(c) Is it a metal or a non-metal?
(d) What type of ion will be formed by an atom of element X? Write the symbol of the ion formed.
(e) What could element X be?
An element has an atomic number 12. How many electrons will be present in the K, L and M energy shells of its atom?
The electronic configuration magnesium is 2, 8, 2. From this it is understood that the valence shell of magnesium is ______.
An atom X has 2, 8, 7 electrons in its shell. It combines with Y having 1 electron in its outermost shell.
What type of bond will be formed between X and Y?
An atom X has 2, 8, 7 electrons in its shell. It combines with Y having 1 electron in its outermost shell.
Write the formula of the compound formed.
Define the term of the electron.
The atom of aluminium is represented by 27Al13. Write down the number of protons in the different orbits or shells in one atom of aluminium.
What are ‘energy levels’?
