During an interstellar survey mission to a rogue comet, an autonomous probe analyzes a crystalline mineral containing an element provisionally designated as Astra-X. The onboard spectrometer determines that each atom of Astra-X has a mass number of 62 and contains 34 neutrons in its nucleus. Assuming the sample consists of electrically neutral atoms, what are the atomic number of Astra-X and the number of electrons orbiting its nucleus?

A) Atomic number: 34; electrons: 28

B) Atomic number: 28; electrons: 28

C) Atomic number: 62; electrons: 34

D) Atomic number: 28; electrons: 34

Atomic number and mass number Original Scenario-Based Download PDF

Chemistry · Atomic Structure · Chemistry · Atoms & Subatomic Particles

1 Chemistry practice questions on Atomic number and mass number. Questions built around original scenarios.

Atomic Structure · Chemistry

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