Advertisements
Advertisements
प्रश्न
Which of the following elements does not lose an electron easily?
विकल्प
Na
F
Mg
Al
उत्तर
F
Explanation -
In the modern periodic table, the electronegativity of the elements decreases down the group and increases along the period from left to right.
APPEARS IN
संबंधित प्रश्न
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
What are the periods in a periodic table? Give two characteristics of each.
State the main aim of classifying elements. Which is the more fundamental property of elements that is used in the development of Modern Periodic Table? Name and state the law based on this fundamental property. On which side of the periodic table one can find metals, non-metals and metalloids?
Give the symbol and valency of the following element and radical.
Sodium
Give the symbol and valency of the following element and radical.
Calcium
Which of the following statements about the Modern periodic table is correct?
p-block is composed of groups 1 and 2.
State any five features of modern periodic table.
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 |
Write the molecular formula of the compound formed by the combination:
E and B
Match the atomic number with the following:
An element of group 2.
