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प्रश्न
Moving down in the second group, number of valence electrons ______.
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उत्तर
Moving down in the second group, the number of valence electrons remains the same.
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संबंधित प्रश्न
Na, Mg and Al are the elements of the same period of Modern Periodic Table having, one, two and three valence electrons respectively. Which of these elements (i) has the largest atomic radius, (ii) is least reactive? Justify your answer stating reason for each case.
Write any one difference in the electronic configurations of group-1 and group-2 elements ?
Classify the following elements into metals, non-metals and metalliods
As, C, Hg, Mg, S, Si
How does the tendency to gain electrons change as we go down in group 17 of the periodic table? Why does it change this way?
Which of the following is the valence shell for the elements of second period of the modern periodic table?
(a) M shell
(b) K shell
(c) L shell
(d) N shell
Which one of the following does not increase while moving down the group of the periodic table?
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.
Arrange the following in increasing order of property indicated
SiO2, P2O5, SO3, Cl2O7 (acidic nature)
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.
