Unit Test — Unit test Answers

The mass number of Fe2+ is 56. How many neutrons are there in a single Fe2+ atom?

Which equation was used by Albert Einstein to explain the photoelectric effect? [E = energy, h = Planck’s constant, and v = frequency.]

The diagram below shows some subatomic particles.What is the particle that is labeled with a question mark (?) in the diagram?

A nitride ion has 7 protons, 8 neutrons, and 10 electrons. What is the overall charge on this ion?

The table below gives some characteristics of element Y.Characteristics of element YValuesMass number11Number of neutrons in a single atom6Average atomic mass (grams/mole)10.81What is the identity of element Y?