Chemistry
Assertion (A): Each element has its own unique symbol, which is a short hand representation of its atom.
Reason (R): The symbol of some elements is the same as the first letter of their names.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Chemical Formula
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Answer
Both A and R are true but R is not the correct explanation of A.
Explanation — The symbol can be based on the Latin or Greek name of the element, or a combination of letters, but it’s not strictly the first letter. For example, Helium has the symbol He, Sodium has Na, and Iron has Fe, which are not simply the first letter of the element's name.
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Which of the following represents the correct symbol of potassium ion ?
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Reason (R): The number of electrons in an atom exceeds the number of protons upon gaining electrons.
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Reason (R): Magnesium oxide is a white amorphous solid.
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