Question

What is the mass (in grams) of the$1$ atom of oxygen?

Answer 1

As we know that in chemistry, periodic tables play a vital role. In the periodic table there are totally $118$ elements. In the periodic table there are totally $18$ columns and $7$ rows. The columns are called groups. Hence, $18$ groups in the periodic table. The rows are called periods. Hence, totally $7$ period in the table. Oxygen is one of the elements in the periodic table. The symbol of oxygen is ${\text{O}}$.Oxygen is one of the sixteen groups in the periodic table. The valency of Oxygen is $2$. The stable oxidation state of Oxygen is $- 2$. The atomic number of the element is nothing but the number of electrons or number of protons. The mass number of the atom is nothing but the sum of the number of protons and the number of neutrons.
Formula used:
The mass of one atom is equal to the atomic weight of the atom divided by the Avogadro number.
$Mass Of One Atom = \dfrac{{Atomic Weight Of Atom}}{{Avogadronumber}}$

Complete answer:
The atomic number of Oxygen is $8$. The mass number of Oxygen is $16$.
The atomic weight of oxygen is $16$.
Avogadro number is $6.022 \times {10^{23}}$.
We calculate the mass (in grams) of $1$ atom of oxygen is given below,
The mass of one atom is equal to the atomic weight of the atom divided by the Avogadro number.
$Mass Of One Atom = \dfrac{{Atomic Weight Of Atom}}{{Avogadro number}}$
Now we can substitute the given values,
$= \dfrac{{16}}{{6.022 \times {{10}^{23}}}}$
On simplification we get,
$= 2.65 \times {10^{ - 23}}$
The mass (in grams) of $1$ atom of oxygen is $2.65 \times {10^{ - 23}}$ grams.
According to the above discussion and calculation the mass (in grams) of $1$ atom of oxygen is $2.65 \times {10^{ - 23}}$grams.

Note:
Oxides of alkaline elements are soluble in water. Alkaline elements are first group elements in the periodic table. Oxides of alkaline earth elements are partial soluble in water. Alkaline earth elements are second group elements in the periodic table. The oxidation reaction means the addition of oxygen or the removal of hydrogen or the loss of electrons in the reaction from reactant to product. Compared to metal, metal oxide is highly stable in nature. The formula of a chemical compound having one oxygen atom and another atom is called oxide. Oxygen is dianion because the oxidation state of Oxygen is $- 2$.