Advertisements
Advertisements
प्रश्न
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the number of valence electrons,
उत्तर
The number of valence electrons is 3
APPEARS IN
संबंधित प्रश्न
Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid elements.
Write the number of vertical columns in the modern periodic table. What are these columns called?
The electronic configuration of the atom of an element X is 2, 8, 4. In modern periodic table, the element X is places in :
(a) 2nd group
(b) 4th group
(c) 14th group
(d) 8th group
An element X belong to 4th period and 17th group, state.
name the family to which it belong.
An element X belong to 3rd periods and group II of the periodic table state:
the number of valence electrons,
Complete the following sentences
The similarities in the properties of a group of elements are because they have the same …………………
Which element has:
twice as many electrons in its second shell as in its first shell?
On the basis of electronic configuration, how will you identify the first and the last element of a period?
The elements of one short period of the periodic table are given below in order from left to right:
| Li | Be | B | C | O | F | Ne |
Which one of the above elements belongs to the halogen series?
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,
