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प्रश्न
iii) Observe the figure and answer the following questions.
a) Identify the block shown by box A and write an electronic configuration of any one element of this block.
b) Identify the block of element denoted by letter B and write its period number.
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उत्तर
a) The block shown by box A is s-Block.
S(16) = 2, 8, 6 (electronic configuration of any element in s block)
b) The block of element denoted by letter B is d – Block.
The period number of that element is 4.
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संबंधित प्रश्न
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Is it a metal or a non-metal?
The elements at the bottom of a group would be expected to show ______ metallic character than the element at the top.
Which has the maximum metallic character Na, Li or K?
Explain why the following statement is not correct:
All groups contain metals and non metals.
Choose the correct answer.
An alkaline earth metal
(i) Lead
(ii) potassium
(iii) calcium
(iv) Copper
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 
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In the third period, which is the most metallic and most non-metallic element?
Supply the missing word from the words given in brackets.
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Write the name.
Two elements having two orbits.
Write scientific reason.
The metallic character of elements increases while going down the groups.
Write a scientific reason.
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Identify the elements with the following property and arrange them in increasing order of their reactivity
- An element which is a soft and reactive metal
- The metal which is an important constituent of limestone
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A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
Will the elements in the group to the right of this boron group be more metallic or less metallic in character? Justify your answer.
