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प्रश्न
Choose the correct answer from the choice given:
An element A belonging to Period 3 and Group II will have
विकल्प
3 shells and 2 valence electrons
2 shells and 3 valence electrons
3 shells and 3 valence electrons
2 shells and 2 valence electrons
उत्तर
3 shells and 2 valence electrons
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संबंधित प्रश्न
Write the electronic configuration of K and Ne.
The elements Be, Mg and Ca each having two electrons in their outermost shells are in periods 2, 3, and 4 respectively of the modern periodic table. Answer the following questions, giving justification in each case:-
(i) Write the group to which these elements belong.
(ii) Name the least reactive element.
(iii) Name the element having largest atomic radius.
How does the size of atoms (atomic size) generally vary in going from left to right in a period of the periodic table? Why does it vary this way?
Why do elements in the same group show similar properties but the elements in different groups show different properties?
The element which has the maximum number of valence electrons is:
(a) Na
(b) P
(c) Si
(d) A
Why are noble gases placed in a separate group?
What is modern periodic law?
The elements of one short period of the periodic table are given below in order from left to right:
| Li | Be | B | C | O | F | Ne |
Which one of the above elements belongs to the halogen series?
Atomic numbers of elements A, B, C, D, E, F are 8, 7, 11, 12, 13 and 9 respectively. State the type of ions they form.
Name or state following with reference to the element of the first three periods of the periodic table.
A covalent compound formed between an element in period 1 and a halogen.
