Question

What does the number 84 in the name of krypton-84 represent ?

Answer 1

Hint : In the given question firstly we have to define what exactly is the ionic bond and how can we determine it and give the proper definition and the characteristics of it. And now we can also say that the compounds formed after the forming of the ionic bond are therefore the ionic compounds and therefore have certain aspects.

Complete Step By Step Answer:
The given question statement asks about the ionic bonds and the elements forming them. We have to provide the basic definition and the other important characteristics for the elements along with the nature of the ionic compounds.
The element of Krypton is named after the Ancient Greek word kryptos that means 'the hidden one'. It is a chemical element in the modern day periodic table with the atomic symbol as Kr and atomic number as 36. As per the physical properties we can say that it is colorless, odorless and tasteless.
It is basically a noble gas that occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. There are rare exceptions but apart from them krypton is chemically inert. Krypton, like the other noble gases, is used in lighting and photography.
In the representation of the Krypton-84 we can say that, the number 84 means that you have 84 nucleons, where we know that 36 of these should be protons (as it is the atomic number), and the remaining 48 are neutrons.
This isotopic nature asn resemblance becomes quite relevant in the field of nuclear chemistry, where sometimes, you have to balance nuclear equations with respect to the mass numbers (nucleon numbers).

Note :
Krypton light has many spectral lines, and krypton plasma is useful in bright, high-powered gas lasers (krypton ion and excimer lasers), each of which resonates and amplifies a single spectral line. Krypton fluoride also makes a useful laser medium.