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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
पर्याय
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
APPEARS IN
संबंधित प्रश्न
Based on the group valency of elements state the formula lot the following giving justification for each :-
(i) Oxides of 1st group elements,
(ii) Halides of the elements of group 13, and
(iii) Compounds formed when an element of group 2 combines with, an element of group 16.
Consider two elements 'A' (Atomic number 17) and 'B' (Atomic number 19) :
(i) Write the positions of these elements in the modern periodic table giving justification.
(ii) Write the formula of the compound formed when 'A' combines with 'B.'
(iii) Draw the electron dot structure of the compound and state the nature of the bond formed between the two elements.
Match the atomic number 2, 4, 8, 15 and 19 with each of the following
1) A solid non metal belonging to the third period.
2) A metal of valency 1.
3) A gaseous element with valency 2.
4) An element belonging to Group 2
5) A rare gas.
Fill in the blank in the following statement:
On going down in a group in the periodic table, the metallic character of elements ...............
Which of the following element would lose an electron easily?
(a) Mg
(b) Na
(c) K
(d) Ca
What is its atomic number?
Name the element in period 3 which does not form oxide.
How many groups and periods are there in the modern periodic table?
State whether the following statement is true or false
Similar electronic configuration is repeated after intervals of 2, 8, 8, 18 and 32.
State the property trends in general of elements on moving from left to right in a period of the periodic table.
