Based on the following information,calculate the mass of one atom of . mass of an electron = 9.110 x 10^-28 g
Mass of a proton = 1.673 x 10^-24 g
Mass of a neutron = 1.675 x 10^-24 g

Question

Based on the following information,calculate the mass of one atom of

. mass of an electron = 9.110 x 10^-28 g
Mass of a proton = 1.673 x 10^-24 g
Mass of a neutron = 1.675 x 10^-24 g

Quizplus · Accepted Answer

The given atom has the following composition:
11 protons (hence atomic number=11)
7 neutrons
51 electrons (as the atom is neutral)

So, the mass of one atom can be calculated as:
(11 x mass of a proton) + (7 x mass of a neutron) + (51 x mass of an electron)
= (11 x 1.673 x 10^-24 g) + (7 x 1.675 x 10^-24 g) + (51 x 9.110 x 10^-28 g)
= 1.856 x 10^-22 g

Therefore, the mass of one atom of 11ea7f51_1e7e_3f3f_9ecd_cd1315f44b76_TB4036_11 is 1.856 x 10^-22 g or 1.440 x 10^-22 atomic mass unit (amu), which is closest to the first option A (1.440 x 10^-22 g).

Based on the Following Information,calculate the Mass of One Atom