Advertisements
Advertisements
प्रश्न
Name an alkali metal in period 3 and halogen in period 2.
Advertisements
उत्तर १
SOL: Na and F
उत्तर २
Period III alkali metal is sodium. Fluorine is a halogen found in period II.
APPEARS IN
संबंधित प्रश्न
How were the positions of isotopes of an element decided in the modern periodic table?
Correct the statement.
Copper and zinc are representative elements.
What is the main characteristic of the last element in each period of the periodic table?
An element E has following electronic configuration:
|
K |
L |
M |
|
2 |
8 |
6 |
(a) To which group of the periodic table does element E belong?
(b) To which period of the periodic table does element E belong?
(c) State the number of valence electrons present in element E.
(d) State the valency of the element E.
State the modern periodic law.
Give the chemical formula of carbonic acid
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
Identify gas A in the following experiment.
In the modern periodic table, elements are arranged according to their ______
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has a similar structure to diamond.
