Question

An ion has a mass number of 65, 36 neutrons, and a charge of +1 . Identify the element symbol, and determine the number of protons and electrons in this ion.
a. element symbol:
b. number of protons:
c. number of electrons:

Answer 1

Answer:

Element symbol Cu

Number of protons 29

Number of electrons 28

Explanation:

To get the element symbol, we need the name of the element. To correctly identify the name of the element, we need the proton number.

Now the mass number is 65 and the number of neutrons is 36. The number of protons is this the mass number minus the number of neutrons. This equals 65 - 36 = 29 protons.

The element with 29 protons is copper Cu.

Now to get the number of electrons, for an electrically neutral atom , the number of electrons equals the number of protons. But here, the atom is not electrically neutral anymore as it has now formed a univalent positive ion of +1.

To form a positive ion, you have to do so by losing electrons. The atom in question here has just lost one electron. Thus, our of the 29, it is left with only 28 electrons.

Answer 2

Answer:

The element is Cu , the ion is Cu+

The number of protons is 29 protons

The number of electrons = 28 electrons

Explanation:

Atomic mass of the ion = 65 amu

The ion has 36 neutrons

The charge of the ion is +1

Protons + neutrons = mass number

Protons = mass number - neutrons

Protons = 65 - 36 = 29 protons

mass number = protons = 29

A neutral atom has same amount of protons as electrons.

The charge is +1 this means the atom lost 1 electron ( 29 - 1 = 28)

Gaining or losing electrons has no impact on the number of protons and neutrons an atom has, which is another way of saying that the mass number is not affected by changes in the net charge.

The element is Cu

The number of protons is 29

The number of electrons = 29 -1 = 28 electrons