Previous Year Questions

Practice Questions

Browse and practice real questions from previous scholarship exams. Use filters to narrow down by year, subject, or exam.

Displaying 4176 - 4180 of 5614
Medium
. SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · 2024 . Sample
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Q. 362
A neutral atom of Argon has atomic number 18. How many electrons does it contain?
Hard
. SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · 2026 . Sample
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Q. 363
An atom of Aluminum has atomic number 13 and mass number 27. How many protons does it contain?
Easy
. SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · 2026 . Sample
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Q. 364
An atom of Sodium has atomic number 11 and mass number 23. How many neutrons does it contain?
Medium
. SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · 2025 . Sample
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Q. 365
A neutral atom of Fluorine has atomic number 9. How many electrons does it contain?
Medium
. SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · 2025 . Sample
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Q. 366
An atom of Potassium has atomic number 19 and mass number 39. How many protons does it contain?