Question

Refer to the diagram below to answer the following questions.


What is the Atomic Number and Atomic Mass of each Carbon atom?



Determine how many valence electrons does each Carbon atom have?



Identify the Carbon isotopes above and briefly explain.

Answer 1

Answer:

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1. → atomic mass = protons + neutrons

= 6+6 = 12amu

→ carbon = 12.0107 u

carbon 13 = 13 u

Carbon 14 = 14.00 u

2. Indeed, carbon has three known isotopes: Carbon-12, Carbon-13, and Carbon-14. The last of these is known to be radioactive. Carbon's four valence electrons allow it to form a variety of bonds and compounds which exist in nature.

3. The most abundant carbon isotope is carbon-12.

The relative atomic mass of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass of carbon.

In fact, the C-12 isotope makes up 98.9% of carbon atoms, C-13 makes up 1.1% of carbon atoms, and C-14 makes up just a trace of carbon atoms as they are found in nature.

Answer 2

Answer:

By definition, an atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu. Other atoms don't generally have round-number atomic masses for reasons that are a little beyond the scope of this article.

Each carbon atom has four valence electrons.

hope it helps u