If an atom has 43 electrons,56 neutrons,and 43 protons,what is its approximate atomic mass? What is the name of this element?
A)atomic mass,137 amu; Barium
B)atomic mass,99 amu; Technetium
C)atomic mass,99 amu; Radon
D)atomic mass 142 amu; Einsteinium

Question

Quizplus · Accepted Answer

The atomic mass of an element is approximately equal to the sum of its protons and neutrons. For this atom, that sum is 43 protons + 56 neutrons = 99. The element with 43 protons (its atomic number) is Technetium.

If an Atom Has 43 Electrons,56 Neutrons,and 43 Protons,what Is