Advertisements
Advertisements
Question
The position of elements A, B, C, D and E in the periodic table are shown below:
|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
|
D |
|
|
B |
C |
|
|
A |
|
|
E |
State which is most reactive (i) metal (ii) non-metal
Advertisements
Solution
Most reactive
(i) Metals: Alkali metals (Group I); Caesium
(ii) Non-metals: Halogens (Group 17); Fluorine
APPEARS IN
RELATED QUESTIONS
Which element has the electronic configuration 2, 8, 2?
Choose the most appropriate answer of the following:
Which of the following would weigh the least?
(A) 2-gram atoms of Nitrogen.
(B) 1mole of Silver
(C) 22.4 liters of oxygen gas at 1 atmospheric pressure and 273K
(D) 6.02 x 1023 atoms of carbon.
[Atomic masses: Ag=108, N=14, O=16, C=12]
An element which is an essential constituent of all organic compounds belongs to following group of modern periodic table:
(a) group 4
(b) group 14
(c) group 15
(d) group 16
Periodicity is observed due to the similar ______.
An element A has atomic number 14. To which period does this element belong and how many elements are there in this period.
An element X belong to 4th period and 17th group, state.
name of the element.
An element 'X' (Atomic number – 20) burns in the presence of oxygen to form a basic oxide.
(a) Identify the element and write its electronic configuration.
(b) State its group number and period number in the Modern Periodic Table.
(c) Write a balanced chemical equation for the reaction when this oxide is dissolved in water.
Going across a period left to right, atomic size _____.
An element A has 2 electrons in its fourth shell. State:
its valency
Name or state following with reference to the element of the first three periods of the periodic table.
A non-metal in period 2 having electronic configuration 2, 6.
