Advertisements
Advertisements
प्रश्न
What are groups and periods in the modern periodic table?
Advertisements
उत्तर
- The horizontal rows are called periods. There are seven periods in the periodic table.
- Vertical columns in the periodic table starting from top to bottom are called groups. There are 18 groups in the periodic table.
APPEARS IN
संबंधित प्रश्न
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
Explain why All the elements of a group have similar chemical properties.
Correct the statement.
Copper and zinc are representative elements.
Name two elements in each case: Lanthanides
An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.
What will be the formula of its phosphate?
Name the noble gas with 3 shells.
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Give the chemical formula of magnesium nitrate
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
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?
