Concept explainers
Using the periodic table as a guide, specify the number of protons and electrons in a neutral atom of each of these elements.
- a. oxygen (O)
- b. magnesium (Mg)
- c. nitrogen (N)
- d. sulfur (S)
(a)
Interpretation:
The number of protons and electrons in given species hasto be identified.
Concept Introduction:
Mass number (A): Mass number of an element is sum of protons and neutrons of the atom.
Consider an element X with atomic number and mass number,
Where,
A is mass number and Z is atomic number (number of proton or electron)
Explanation of Solution
For oxygen, the number of protons and electrons is calculated as follows,
Thus, the number of protons and electrons are found 8 and 8 respectively.
(b)
Interpretation:
The number of protons and electrons in given species hasto be identified.
Concept Introduction:
Mass number (A): Mass number of an element is sum of protons and neutrons of the atom.
Consider an element X with atomic number and mass number,
Where,
A is mass number and Z is atomic number (number of proton or electron)
Explanation of Solution
For Magnesium, the number of protonsand electrons is calculated as follows,
Thus, the number of protons and electrons are found 12 and 12 respectively.
(c)
Interpretation:
The number of protons and electrons in given species hasto be identified.
Concept Introduction:
Mass number (A): Mass number of an element is sum of protons and neutrons of the atom.
Consider an element X with atomic number and mass number,
Where,
A is mass number and Z is atomic number (number of proton or electron)
Explanation of Solution
For Nitrogen, the number of protons and electrons is calculated as follows,
Thus, the number of protons and electrons are found 7 and 7 respectively.
(d)
Interpretation:
The number of protons and electrons in given species hasto be identified.
Concept Introduction:
Mass number (A): Mass number of an element is sum of protons and neutrons of the atom.
Consider an element X with atomic number and mass number,
Where,
A is mass number and Z is atomic number (number of proton or electron)
Explanation of Solution
For oxygen,the number of protons and electrons is calculated as follows,
Thus, the number of protons and electrons are found 16 and 16 respectively.
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Chapter 3 Solutions
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