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Question
What are the periods in a periodic table?
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Solution
“Horizontal rows from left to right in a periodic table are called periods.”
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RELATED QUESTIONS
The position of three elements A, B and C in the Periodic Table are shown below –
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Group 16
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Group 17
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A
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B
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C
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(a) State whether A is a metal or non-metal.
(b) State whether C is more reactive or less reactive than A.
(c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element A?
Explain why, the noble gases are placed in a separate group.
Give alongside is a part of the periodic table :
As we move horizontally from left to right:
| Li | Be | B | C | N | O | F | |
| Na | Mg | Al | Si | P | S | Cl |
(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?
Name an alkali metal in period 3 and halogen in period 2.
Compare Modern Periodic Law with Mendeleev's Periodic Law.
Find the correlation:
Mendeleev’s periodic table : atomic mass : : Modern periodic table : _______
______ is the longest period in the periodical table.
If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
Arrange the following elements in the increasing order of their metallic character
| Mg, | Ca, | K, | Ge, | Ga |
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 |
Which of the element is a Metalloid?
