Advertisements
Advertisements
प्रश्न
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 Noble gas?
उत्तर
Element C belongs to group 18 of the periodic table. Hence, it is a noble gas.
APPEARS IN
संबंधित प्रश्न
Name the scientist who prepared modern periodic table.
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
Define:- Periodic table
Name two elements in Alkaline earth metals.
Arrange the elements of second and third periods in increasing order of their atomic size.
Third Period.
Give the symbol and valency of the following element and radical.
Hydrogen
The arrangement of elements in the Modem Periodic Table is based on their ______
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
Define periods of modern periodic table.
A group of elements in the periodic table is given below (Boron is the first member of the group and Thallium is the last).
Boron, Aluminium, Gallium, Indium, Thallium
Answer the following question in relation to the above group of elements:
If the electronic configuration of aluminium is 2, 8, 3, how many electrons are there in the outer shell of thallium?
