Advertisements
Advertisements
प्रश्न
Which one of the following is a correct electronic configuration of sodium?
पर्याय
2, 8
8, 2, 1
2, 1, 8
2, 8, 1
Advertisements
उत्तर
2, 8, 1
Explanation:
The atomic number of sodium (Na) = 11
Its electronic configuration = 2, 8, 1
APPEARS IN
संबंधित प्रश्न
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 ______.
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’?
The following element is given \[\ce{_18Y}\]. State the electronic configuration and state whether it is a metal, non-metal, or inert gas.
Explain the octet rule for the formation of –
Nitrogen molecule from two nitrogen atoms.
Give a reason for the following:
The shells surrounding the nucleus of an atom are also called ‘energy levels’.
Give a reason for the following:
Helium is chemical extremely unreactive.
Which block of the periodic table contains metals, non-metals, and metalloids?
The outermost shell of an atom cannot accommodate electrons more than ______.
