Respuesta :
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:
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
