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Q. 12

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
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Short Answer

Identify the element, the isotope, and the charge state of each atom in FIGURE . Give your answer in symbolic form, such as 4He+ or 8Be-.

From the figure we can conclude

a) 6Li+

b) 13C-

See the step by step solution

Step by Step Solution

Part (a): Step 1: Given Information

We have given a figure. From the figure, it can be seen that a figure of an atom having neutrons, protons, and electrons is given.

Part (a): Step 2: Explanation

The total number of protons gives the atomic number. So, protons mean an atom having an atomic number which means it is Lithium (Li).

As we know for an atom to be neutral it must have an equal number of protons and electrons. But in the figure, there are only electrons. So, it is positively charged.

Now, atomic mass is calculated by adding the total number of protons and neutrons. So, protons neutrons = amu. (atomic mass unit)

Thus, it is 6Li+.

Part (b): Step 1: Given Information

We have given a figure. From the figure, it can be seen that a figure of an atom having protons, neutrons and electrons.

Part (b): Step 2: Explanation

The total number of protons gives the atomic number. So, protons mean an atom having atomic number which means it is Carbon (C).

As we know for an atom to be neutral it must have an equal number of protons and electrons. But in the figure, there are electrons. So, it is negatively charged.

Now, atomic mass is calculated by adding the total number of protons and neutrons. So,

Thus, it is 13C-.

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