Question

How many grams does a hydrogen atom weigh?

Answer 1

Hint: We know that gram is a metric unit of mass which is equal to one-thousandth of a kilogram. With the help of mole concept we are going to answer the following question as the mole concept is the convenient way to express the amount of substance. Mole concept uses the unit “mole” which is a count of a huge number of particles.

Complete step by step answer:
Firstly, hydrogen is the chemical element with the symbol $H$ and atomic number $1$ . Therefore, hydrogen is the most abundant chemical substance in the universe.
We know that the weight of a hydrogen atom is $1$ gram which is also its atomic weight and also its atomic number.
Moreover, we know that $1$ molecule is made up of $6.023 \times {10^{23}}$ atoms.
Hence, $1$ atom will have $1$ gram of hydrogen. Then, $6.023 \times {10^{23}}$ atoms will have $\dfrac{1}{{6.023 \times {{10}^{23}}}}$ grams of hydrogen.
So, the amount of hydrogen will be $1.66 \times {10^{24}}$ grams.
Alternative method:
We have simple calculations to calculate the exact mass of one hydrogen atom.
As we know,
Mass of proton $ = 1.008 gram/mol$.
One mole of gas at STP contains $6.023 \times {10^{23}}$ atoms.
Now, assuming negligible mass of electrons.
Mass of one atom of hydrogen $ = 1.008 g/mole\times 6.023 \times {10^{23}}$ atoms.
=$1.67\times {10^{27}}$Kg/mole

Note: Talking about hydrogen, it is the most abundant element in the universe. As it is clear to all, that it is found in the sun and most of the stars, planets Jupiter which is composed mostly of hydrogen. On the earth, hydrogen is found in greatest quantities in water. Moreover, at standard temperature and pressure, hydrogen is colourless, odorless, tasteless, it is non-toxic, non-metallic, highly combustible diatomic gas with the molecular formula ${H_2}$.
Since hydrogen readily forms covalent compounds with the most non-metallic elements, and most of the hydrogen on earth exists in molecular forms such as water.

If we breathe hydrogen in high concentrations, this can cause an oxygen deficient environment and we may experience some symptoms like headache, subconsciousness, depressing of all the senses.