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प्रश्न
Name the non-metals in the first twenty elements.
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उत्तर
C, N, O, F, Ne, P, S, Cl, Ar, H and He.
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संबंधित प्रश्न
What is meant by a period, in a periodic table?
Give two example of group 18 elements.
Answer the following in respect of element `31/15 P `
To which group and period does it belong?
The electronic configuration of an element T is 2, 8, 8, 1.
What is the period number of T?
State the modern periodic law.
Which of the following elements does not lose an electron easily?
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?
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
Match the atomic number with the following:
An element of group 2.
