Oganesson (Og): what kind of element is it?

In short

The table is filled

In November 2016, four names became official: nihonium, moscovium, tennessine and oganesson. With that, every element from 1 to 118 had an official name and symbol, and the periodic table was filled all the way to the seventh row.

Oganesson was found in 2006, made by smashing calcium (number 20) into californium (number 98). The discovery was confirmed in 2015.

From the 1960s, Oganessian was at the center of a Soviet research group. In 1974 he devised the method that Germany later used to make elements 107 to 112. He was alive when the name was proposed.

Where it sits on the table

Oganesson is in the seventh row of Group 18, at the bottom of the column with helium, neon, argon, krypton, xenon and radon.

Oganesson is the last square on the table. Making elements from 119 on is expected to be even harder.

Think about it

• Q1What is 98 + 20?
• Q2If element 119 is made, where on the table do you think it will go?
• Q3Can you name the Group 18 elements from the top?

There is no single right answer. Talking it over with someone at home is a good way to learn.