Which part of an atom has a relative mass of 1 and a relative charge of 0 ?
A.
electron
B.
neutron
C.
nucleus
D.
proton
Exam No：0620_s25_qp_11 Year：2025 Question No：4
Answer:
B
Knowledge points:
6.1.1. Identify physical and chemical changes, and describe the differences between them
Solution:
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