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Question
Name the type of elements which have one electron short of octet.
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Solution
Halogens
RELATED QUESTIONS
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
From the standpoint of atomic structure, what determines which element will be the first and which the last in a period the periodic table?
What are the advantages of the periodic table?
The following diagram shows a part of the periodic table in which the elements are arranged according to their atomic numbers. (The letters given here not the chemical symbols of the elements):
| a 3 |
b 4 |
c 5 |
d 6 |
e 7 |
f 8 |
g 9 |
h 10 |
|
| i 11 |
j 12 |
k 13 |
l 14 |
m 15 |
n 16 |
o 17 |
p 18 |
(i) Which element has a bigger atom, a or f?
(ii) Which element has a higher valency, k or o?
(iii) Which element is more metallic i or k?
(iv) Which element is more non-metallic, d or g?
(v) Select a latter which represents a metal of valency 2.
(vi) Select a letter which represents a non-metal of valency 2.
Define:
Periodic table
Correct the statement.
Copper and zinc are representative elements.
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
Distinguish between:
Group 17 - Group 18
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?
Name the metalloids in the first twenty elements.
