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प्रश्न
Fill in the blank in the following statement:
In going across a period (right to left) in periodic table, the atomic size of the atom ...............
उत्तर
On moving across a period (right to left) in the periodic table, the atomic size of an atom increases.
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संबंधित प्रश्न
Rewrite the following statement after correction, if necessary:
Elements in the same period have equal valency
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the periodic table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
The atomic numbers of three elements A, B and C are given below:
| Element | Atomic number |
| A | 5 |
| B | 7 |
| C | 10 |
(i) Which element belongs to group 18?
(ii) Which element belongs to group 15?
(iii) Which element belongs to group 13?
(iv) To which period/periods do these elements belong?
An element X belong to 3rd periods and group II of the periodic table state:
the valency,
Arrange the following in order of increasing radii:
N, O, P
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 |
Place the three elements fluorine, beryllium and nitrogen in the order of increasing electronegativity.
An element belongs to the third period and Group IIIA (13) of the periodic table. State: if it is a metal or non-metal?
Name or state following with reference to the element of the first three periods of the periodic table.
The formula of the hydroxide of the element having electronic configuration 2, 8, 2.
Give a reason for the following:
A transition from metallic to non-metallic elements is seen on moving from left to right in a period of the periodic table.
There are three elements E, F, G with atomic numbers 19, 8 and 17 respectively.
Classify the above elements as metals and non-metals.
