Multiple Choice QuestionsA p-type material is electrically
positive
negative
neutral
depends on the concentration of p impurities
Li nucleus has three protons and four neutrons. Mass of lithium nucleus is 7.016005 amu. Mass of proton is 1.007277 amu and mass of neutron is 1.008665 amu. Mass defect for lithium nucleus in amu is
0.04048 amu
0.04050 amu
0.04052 amu
0.04055 amu
B.
0.04050 amu
Mass defect = mass of nucleons − mass of nucleus
= (3 × 1.007277 + 4 × 1.008665) − 7.016005
= 0.040486 amu
≈ 0.04050 amu
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