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Question
An element A has 2 electrons in its fourth shell. State:
position in the periodic table
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Solution
Position in the periodic table is group 2 period 4
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RELATED QUESTIONS
Taking the example of an element of atomic number 16, explain how the electronic configuration of the atom of an element relates to its position in the modern periodic table and how valency of an element is calculated on the basis of its atomic number.
Write the number of horizontal rows in the modern periodic table. What are these rows called?
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In each of the following pair, choose the atom having the bigger size:
Na (At. No. 11) or K (At. No. 19)
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The following questions refer to the Periodic Table.
Name the first and last element in period 2.
In the above table, H does not represent hydrogen.Some elements are given in their own symbol and position in the periodic table while others are shown with a letter. With refrence to the table answer the following questions.
1. Identify the most electronegative element.
2. Identify the most reactive element of Group I.
3. Identify the element from Period 3 with least atomic size.
4. How many valence electrons are present in Q?
5. Which element from group 2 would have the least ionisation energy?
6. Identify the noble gas of the fourth period.
7. In the compound between A and H, what type of bond would be formed and give its molecular formula.
The position of elements A, B, C, D and E in the periodic table are shown below:
|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
|
D |
|
|
B |
C |
|
|
A |
|
|
E |
State which is metals, non-metals, and noble gas in this table.
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the name of the element.
Moving left to right in the second period, the number of valence electrons _____.
