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प्रश्न
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
उत्तर
The chemical reactivity of alkali metals increases on going down in group 1 of the periodic table.
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संबंधित प्रश्न
State modern periodic law.
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
Which of the following are the correct characteristics of isotopes of an element?
(i) same atomic mass
(ii) same atomic number
(iii) same physical properties
(iv) same chemical properties
(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
Correct the statement.
Transition elements are placed at extreme right of the periodic table.
Name two elements in each case:
Transition element
From the standpoint of atomic structure, what determines which elements will be the first and which the last in a period of the periodic table?
Name the cation and the anion in the salt – calcium sulphate
Which of the following statements about the Modern periodic table is correct?
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
Define groups of modern periodic table.
