Atomic mass
Atomic mass is a Science & Technology concept from the MPSC syllabus, tested in 4 past MPSC questions (2013, 2019, 2025). Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.
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खालील धातू विचारत घ्या. (a) प्लॅटिनम (b) सोने (c) तांबे (d) शिसे चढत्या धनतेनुसार त्यांची क्रमवारी लिहा : Consider the following metals : (a) Platinum (b) Gold (c) Copper (d) Lead Their correct arrangement in the increasing order of density is :
(a)प्लॅटिनम / Platinum
(b)सोने / Gold
(c)तांबे / Copper
(d)शिसे / Lead
Platinum has the highest density among the given metals, followed by gold, lead, and copper. Arranging them in increasing order gives copper, lead, gold, and platinum.
व्यावहारिक दृष्ट्या अणूचे सारे वस्तुमान मुख्यत्वे त्याच्या पुढील कणांमध्ये एकत्रित असते... / Practically all the mass of an atom is concentrated in its
(a)प्रोटॉन / Protons
(b)न्युट्रॉन / Neutrons
(c)इलेक्ट्रॉन / Electrons
(d)वरील सर्व / All the above
Practically all the mass of an atom is concentrated in its nucleus, which consists of protons and neutrons (nucleons). Electrons have negligible mass.
हायड्रोजनचे समस्थानिके आणि त्यांचे अनुक्रमे वस्तुमान गुणोत्तर ________ आहे. The isotopes of hydrogen and their respective mass ratio are ________.
The isotopes of hydrogen are Protium, Deuterium, and Tritium, with mass numbers 1, 2, and 3 respectively, giving a mass ratio of 1 : 2 : 3.
कार्बनचा अणुक्रमांक किती आहे ? What is the atomic number of carbon ?
Carbon is a chemical element with the symbol C and atomic number 6, meaning it has 6 protons in its nucleus.