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2 Which two particles each have a mass approximately equal to one atomic mass unit?(1) positron and

Regents Chemistry Exam January 2023


2 Which two particles each have a mass approximately equal to one atomic mass unit? (1) positron and proton

(2) positron and electron

(3) neutron and electron

(4) neutron and proton


Solution: Proton and neutron have a mass approximately equal to one atomic mass unit. Electron is very light and positron has the same weight as an electron but opposite charge.


Answer: 4

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