Advertisements
Advertisements
प्रश्न
What are the elements.
Advertisements
उत्तर
“Elements are pure substances made up of one kind of atoms and cannot be broken down into simpler substances.” 118 elements are there.
APPEARS IN
संबंधित प्रश्न
Why do all the elements of the same group have similar properties?
How were the positions of isotopes of an element decided in the modern periodic table?
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
Arrange the elements of second and third periods in increasing order of their atomic size.
Third Period.
State the number of elements in Period 1 of the Periodic Table.
What are groups and periods in the modern periodic table?
Which of these belong to the same period?
| Element | A | B | C |
| Atomic number | 2 | 10 | 5 |
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 non-metals in the first twenty elements.
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
