Question
Which is the element having the highest atomic mass among the following?
The correct answer is
Calcium
Correct Answer: Option 2 – Calcium
Comparing Atomic Masses:
| Element | Symbol | Atomic Number | Atomic Mass (Approx.) |
|---|---|---|---|
| Magnesium | Mg | 12 | 24.305 u |
| Sulphur | S | 16 | 32.06 u |
| Chlorine | Cl | 17 | 35.45 u |
| Calcium | Ca | 20 | 40.078 u |
Key Point:
• Calcium has the highest atomic number (20) among the given options.
• It also has the highest atomic mass (about 40.078 u).
Therefore, Calcium has the highest atomic mass among the given elements.
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Important Questions from Basic Concepts of Chemistry
Which of the following given below is an alloy of mercury?
The chemical symbol of potassium is _______.
In a molecule of water, the ratio of the mass of hydrogen to that of oxygen is:
Each water molecule, contains _______ hydrogen atoms and one Oxygen atom.
_______ alloy consists of nickel, copper and zinc.
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