What is the mass defect of lithium? Assume the following: Atomic number of lithuim = 3 Atomic mass of lithuim = 7.0144 atomic mass units. Mass of 1 proton = 1.0073 atomic mas units. Mass of 1 neutron = 1.0087 atomic mass units.

Question

Chemistry

Kismet

20 January, 13:55

What is the mass defect of lithium? Assume the following: Atomic number of lithuim = 3 Atomic mass of lithuim = 7.0144 atomic mass units. Mass of 1 proton = 1.0073 atomic mas units. Mass of 1 neutron = 1.0087 atomic mass units.

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Answers (2)

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Areli Pitts · Answer 1

Areli Pitts 20 January, 15:24

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Answer:0.0423 atomic mass units

Rex Boone · Answer 2

0.0423 amu.

Explanation:

Li atom has 3.0 protons and 4.0 neutrons. The mass of Li = mass of protons + mass of neutrons. The mass of protons = (3) (1.0073 amu) = 3.0219 amu. The mass of neutrons = (4) (1.0087 amu) = 4.0348 amu. The mass of Li = mass of protons + mass of neutrons = 3.0219 + 4.0348 = 7.0567 amu. The mass defect of Li = the mass of Li - the atomic mass of Li = 7.0567 - 7.0144 = 0.0423 amu.