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Question
What is meant in the periodic table by a period?
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Solution
In a periodic table, elements are arranged in the order of increasing atomic numbers in horizontal rows called periods.
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RELATED QUESTIONS
Compare and contrast the arrangement of elements in Mendeleev’s periodic Table and the Modern Periodic Table.
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
Name two elements in each case:
Transition element
Name the noble gas with 3 shells.
Give the symbol and valency of the following element and radical.
Calcium
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
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Mendeleev’s periodic table : atomic mass : : Modern periodic table : _______
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
A and F
What is the general name of the last elements of the Periodic Table?
