Question

Problem No1: From the Periodic Table of the Elements calculate the mass (in kg) of an atom of naturally occurring carbon. (Hint: 1u=1.66×10^-27kg, where u is Atomic Mass Unit)

Answer 1

Answer:

Here's your answer

Explanation:

To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons.

Example: Find the atomic mass of an isotope of carbon that has 7 neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons. The atomic mass of the atom is the mass of the protons plus the mass of the neutrons, 6 + 7, or 13

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Answer 2

Explanation:

1u=1÷12×mass of carbon atom. ie. one twelth of mass of carbon atom is called amu.

so here 1u=1.66×10^-27kg

substitute this value in 1st eq

1.66×10^-27=12×mass of carbon

mass of carbon=138.3×10^-30

by roundig approx. u will get

mass=1.4×10-28=14×10^-27