# Problem: Which ion has twenty-eight electrons?A. Cr2+B.Fe2+C. Ni2+D. Zn2+

###### FREE Expert Solution
81% (204 ratings)
###### FREE Expert Solution

We’re being asked which among the given ions has twenty-eight (28) electrons.

An element can be represented as:

You can determine the identity of the element using its atomic number:

Atomic number (Z):

represents the identity of the element
reveals the number of protons
in a neutral element:

# of protons = # of electrons

Mass number (A)

reveals the number of protons and neutrons

mass number = # of protons + # of neutrons

Given:           # of electrons = 28 e-

81% (204 ratings)
###### Problem Details

Which ion has twenty-eight electrons?

A. Cr2+

B.Fe2+

C. Ni2+

D. Zn2+

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Subatomic Particles concept. You can view video lessons to learn Subatomic Particles. Or if you need more Subatomic Particles practice, you can also practice Subatomic Particles practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofWhich ion has twenty-eight electrons?A. Cr2+B.Fe2+C. Ni2+D. ...as low difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Jules took 1 minute and 16 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Beazley's class at UCF.