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प्रश्न
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of elements in group 1 [I–A].
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उत्तर
Valency of elements in group [I–A] is +1
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संबंधित प्रश्न
Fill in the blank in the following statement:
On moving form right to left in the second period, the number of valency electrons ...............
The element which has the maximum number of valence electrons is:
(a) Na
(b) P
(c) Si
(d) A
Which of the following set of elements is written correctly in the order of their increasing metallic character?
(a) Mg, Al, Si
(b) C, O, N
(c) Na, Li, K
(d) Be, Mg, Ca
An element X belong to 4th period and 17th group, state.
no of valence electrons in it
Name the element of lower nuclear charge out of Be and Mg.
Fill in the blank
Oxidising property ________from fluroine to iodine because the power to accpet electron decreases.
The following table represents the first period of the modern periodic table. Study the table and answer the questions that follow:
- Write the formula of the sulphate of the element with atomic number 13.
- What type of bonding will be present in the oxide of the element with atomic number 1?
- Which feature of the atomic structure accounts for the similarities in the chemical properties of the elements in group VIIA of the periodic table?
- Name the element which has the highest ionization potential.
- How many electrons are present in the valence shell of the element with atomic number 18?
- What is the name given to the energy released, when an atom in its isolated gaseous state accepts an electron to form an anion?
- What is the electronic configuration of the element in the third period which gains one electron to become an anion?
- Fill in the blanks:
The atomic size ______ as we move from left to right across the period, because the ______ increases, but the ______ remains the same.
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.
Select the correct answer from the options given below.
It is a metal in period 2 having electronic configuration 2, 1?
Select the correct answer from the options given below.
It is a period having elements from atomic no. 11 to 18.
