What is the mass defect of lithium? assume the following: atomic number of lithium = 3 atomic mass of lithium = 7.0144 atomic mass units. mass of 1 proton = 1.0073 atomic mass units. mass of 1 neutron = 1.0087 atomic mass units.
(a)0.0043 atomic mass units
(b)0.0423 atomic mass units
(c)3.0219 atomic mass units
(d)4.0348 atomic mass units
(e)7.0567 atomic mass units

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)