Question

Which element has 34 protons, 46 neutrons, 36 electrons?

Answer 1

selenium is the answer

Answer 2

Answer: The ion formed is
`_(34)^(80)\textrm{Se}^(2-)`

Step-by-step explanation:

An ion is formed when an atom looses or gains electron.

• When an atom looses electrons, it will form a positive ion known as cation.
• When an atom gains electrons, it will form a negative ion known as anion.

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

Atomic mass is defined as the sum of number of protons and neutrons that are present in an atom.

Atomic mass = Number of protons + Number of neutrons

The isotopic representation of an atom is:
`_Z^A\textrm{X}`

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

We are given:

Number of protons = 34

Number of neutrons = 46

Atomic Mass = 34 + 46 = 80

Number of electrons = 36

As, the number of electrons is more than the number of protons, it forms negative ion

Hence, the ion formed is
`_(34)^(80)\textrm{Se}^(2-)`