reagan2064 reagan2064

07-10-2018
Chemistry

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Number 72 I need help

Number 72 I need help class=

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JasonZhu JasonZhu

07-10-2018

A. Cs - 55 electrons, 55 protons, 77 neutrons
B. Co - 27 electrons, 22 protons, 32 neutrons
C. Tm - 69 electrons, 69 protons, 94 neutrons
D. Zn - 30 electrons, 30 protons, 40 neutrons

For any neutral atom, protons = electrons = atomic number. Neutrons = atomic mass - atomic number.

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