The most basic general formula for the amide is: rnco rhcn rconh2 nanh2

Option (c) is the correct answer.

Explanation:

An organic compound that contains the functional group "" is known as an amide.

General chemical formula of an amide is , where R can be alkyl or aryl group.

For example, is a primary amide whose name is ethanamide.

A compound that contains a functional group "-NCO" is known as an isocyanate group.

And, "-CN" functional group is known as cyanate group.

is a compound called sodamide and it is a specific formula.

Hence, we can conclude that the most basic general formula for the amide is .

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.