What is the symbol of the element Krypton?

Appeared in: RRB Nsg. Superintendent-20 July 2019 (Shift-3rd)

Explanation

Kr is the internationally recognized chemical symbol for the element Krypton.
On the periodic table, Krypton has the atomic number 36.
Krypton is classified as a noble gas (Group 18) and is known for being colorless, odorless, and largely inert.

Option A: K is the chemical symbol for Potassium, an alkali metal.
Option C: Ky is not a recognized chemical symbol for any element on the periodic table.
Option D: Kn is not a recognized chemical symbol for any element on the periodic table.

Visual 1: Periodic Table - An infographic of the periodic table with the element Krypton (Kr) highlighted to show its position among the noble gases.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Chemical symbols of elements as background academic context rather than a clinical decision trigger.
While elemental Krypton has few direct clinical applications, its radioactive isotope, Krypton-81m, is used in nuclear medicine.
Nurses, particularly in respiratory or radiology units, may encounter patients undergoing ventilation/perfusion (V/Q) scans, where Krypton-81m gas is inhaled to assess lung ventilation.
A strong foundational knowledge of basic sciences, including chemistry, is essential for understanding pharmacology, lab values, and diagnostic procedures.

How to Approach the Question

This is a factual recall question from basic chemistry, which forms a foundation for nursing studies.
First, identify the core of the question: it asks for the chemical symbol of the element Krypton.
Access your memory of the periodic table or common element symbols learned in science courses.
Evaluate each option systematically: 'K' is commonly known as Potassium. 'Kr' is the correct symbol for Krypton. 'Ky' and 'Kn' are not standard symbols for any element.
Select the option that correctly matches the element name to its symbol.

Concept Tested & Keywords

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Practise the full RRB Nsg. Superintendent-20 July 2019 (Shift-3rd)

Attempt every question from this paper in a timed mock, then review the full solution for each one.