Advertisements
Advertisements
प्रश्न
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
Advertisements
उत्तर
- Cobalt – Co
- Carbon – c
- Aluminium – A1
- Helium – He (correct)
- Sodium – Na
APPEARS IN
संबंधित प्रश्न
What do you understand by :
Noble gases
Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be respectively :
What do the following symbol stand for?
H
Give the names and symbols of the first twenty elements of the periodic table.
Give the symbol and the number of atoms of the following elements present in sodium chloride.
Match the symbols of – radicals – with their correct combining power or capacity, (valency).
(a) OH
(b) So4
(c) No3
(d) Co3
Combining power or capacity – A : 3; B : 2; C : 1. (negative valencies)
State which element exists in the highest percentage in earth’s crust.
Give the symbol of the following element:
Carbon
Select the correct answer from the choice in the bracket.
The formula of caustic soda.
Antimony has the highest tensile strength.
