Determine the element symbol, number of protons, and number of electrons for an ion that has a mass number of 56, 30 neutrons, and a charge of + 3.

Al

Explanation:

Protons = mass number - neutrons 56-30 = 26 closest is Al 27

Also in group 13 which loses 3 electrons to be + 3

Element symbol: Iron (Fe)

Number of protons: 26

Number of electrons: 23

Explanation:

Recall that:

Mass number = Number of protons + Number of neutrons

56 = y + 30

y = 56 - 30 = 26

Thus, the number of protons is 26

Also, recall that Atomic number = Number of protons

So, atomic number also equals 26.

Then, a charge of + 3 mean the element has given off 3 electrons

this means 26 - 3 = 23

So, the number of electrons is 23