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प्रश्न
An element has 2 electrons in its N shell.
State its position in periodic table.
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उत्तर
Electronic configuration of the element is:
| K | L | M | N |
| 2 | 8 | 8 | 2 |
∴ Position in the periodic table is the 4th period. (Four shells).
संबंधित प्रश्न
What is periodicity in properties of elements with reference to the Modern Periodic Table?
Which of the following statement about the modern periodic table is correct?
(a) It has 18 horizontal rows known as periods.
(b) It has 7 vertical columns known as periods.
(c) It has 18 vertical columns known as groups.
(d) It has 7 horizontal rows known as groups.
What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
Write the number of protons, neutrons and electronic configuration of \[\ce{_19^39K, _15^31P}\]. Also state their position in periodic table.
What would be the correct order if Zn, Fe, Al and Cu are arranged in increasing order of reactivity?
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Nitrate
How were elements arranged in the long form of the periodic table or the Modern Periodic Table?
______ group elements are called alkaline earth metals.
Name the non-metals in the first twenty elements.
