Question
How is hydrogen molecule formed?
✓
Answer
The atomic number of hydrogen is $1,$ its atom contains $1$ electron in $K$ shell. It requires one more electron to complete the $K$ shell and attain the configuration of helium (He). To meet this requirement two hydrogen atoms share their electrons with each other to form $H_2$ molecule. One covalent bond, i.e. a single bond is formed between two hydrogen atoms by sharing of two electrons.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Rearrange and write proper alphabetical sequence only and complete the given blanks:
Complete the table, if a metal reacts with the reagent then mark ✓ and if not then ✗.
| Metal | Ferrous sulphate | Silver nitrate | Copper sulphate | Zinc sulphate |
| Cu | ||||
| Al |
Observe the given below the figure, correct it and explain and write about the concept depicted in this figure.
write a short note on: Moseley’s contribution and the modern periodic table.
What were the limitations of Newlands’ law of octaves?
Name any six domestic appliances whose working is based on the heating effect of electric current.
(OR)
State applications of heating effect of electric current.
(OR)
State applications of heating effect of electric current.
Explain with the help of labelled ray diagram, the defect of vision called myopia and how it is corrected by a lens.
Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.
State Fleming’s right hand rule.
Read the following paragraph and answer the questions based on it:
If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy.
The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistant box, then no energy can flow from inside the box or come into the box.
i. Heat is transferred from where to where?
ii. Which principle do we learn about from this process?
iii. How will you state the principle briefly?
If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy.
The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistant box, then no energy can flow from inside the box or come into the box.
i. Heat is transferred from where to where?
ii. Which principle do we learn about from this process?
iii. How will you state the principle briefly?