Periodic table was first published in 1869. (Ed Uthman/Flickr)

150 years later, 2019 is the International Year of the Periodic Table

The periodic table is not just a typical wall decoration in high school science classrooms

The United Nations announced 2019 as the International Year of the Periodic Table of the Chemical Elements to highlight its first publication in 1869. The periodic table as we know it today was first designed by the Russian scientist Dmitri Ivanovich Mendeleev.

The periodic table is not just a typical wall decoration in high school science classrooms, it is also an exceptional tool for scientists to understand, and even predict, the properties of all the elements.

The announcement by the United Nations will help to raise the profile of how chemistry can provide solutions to global challenges in agriculture, education, energy and health.

The sesquicentennial

This year marks the 150th anniversary of the first publication of the periodic table by Mendeleev. Since its creation, the periodic table has been at the centre of a lot of vivid debates and is now considered as “one of the most important and influential achievements in modern science reflecting the essence not only of chemistry, but also of physics, biology and other disciplines.”

Mendeleev’s genius lies in the acknowledgement that at the time, not all the elements were known yet, so he left gaps in the table for undiscovered elements. At that time, only 63 elements had been identified. Still the properties of five other elements (the gaps brilliantly added to complete the table) could already been determined using the table.

Other versions

Mendeleev’s table has been in the spotlight for decades, but a few other scientists had tried before him to organise all the known elements. As early as 1789, Antoine Lavoisier established a list of 33 elements and tried to unlock the secrets of chemical elements and classify them according to their properties.

Scientists like Alexandre-Emile Beguyer de Chancourtois, John Newlands and Julius Lothar Meyer each proposed a different way to arrange the elements. A helix, chart, cylinder and even a spiral were proposed to visualise the arrangement of the elements, but none seemed to be a perfect fit.

Saving some spot

The discovery of some of these elements in the following years confirmed Mendeleev’s predictions, and revealed the brilliance of the Periodic Law, as Mendeleev called his table.

Fifty five elements have been discovered since Mendeleev’s first scheme, and they were all incorporated to the existing classification according to their atomic mass. Of course, they have the properties foreseen by the uncomplete table which explains why Mendeleev’s attempt to order the elements was so successful and has survived the centuries.

Element 101 was named mendelevium to honour Mendeleev’s contributions. This is actually an even rarer distinction than winning the Nobel prize: only 50 scientists have elements named after them, while 180 chemists have received a Nobel prize in chemistry.

In 2016, four elements still had to be discovered according to the gaps in the periodic table. With the addition of nihonium, moscovium, tennessine and oganesson, the periodic table is now complete.

Or is it?

Naming 2019 as the International Year of the Periodic Table may bring the public’s attention to the importance of chemistry in our lives, stoke our curiosity for science and encourage scientists’ interest in uncovering even more elements.

Alexandra Gelle, PhD Candidate in Chemistry, McGill University , The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

Jayda Monilaws is selling cupcakes again for Central Alberta Humane Society

The 10-year-old Red Deerian is selling cupcakes today from 10 a.m. to 6 p.m.

Alberta was crowned champions in Wheelchair Basketball at Canada Winter Games

Ontario won silver while Quebec took home the bronze medal

Pride Days are Feb. 21st and 28th during the 2019 Canada Winter Games

Events will be held at the 52 North Music + Cultural Festival

PHOTO: Meeting of the mayors

Winnipeg Mayor Brian Bowman, Red Deer Mayor Tara Veer and Naheed Nenshi, mayor of Calgary enjoyed a meeting at the Winter Games Thursday.

Alberta to play for gold in wheelchair basketball

Action-packed first week of Canada Winter Games nearly a wrap

Trudeau tells Canadians to listen to clerk in SNC-Lavalin matter

Privy Council clerk Michael Wernick delivered a blunt assessment at the House of Commons justice

Mueller report looming, new attorney general in hot seat

Robert Mueller is required to produce a confidential report to pursue or decline prosecutions

B.C. woman shares story of abuse with church officials ahead of Vatican summit

Leona Huggins was the only Canadian in the gathering ahead of a historic summit at the Vatican

Sylvan Lake’s Megan Cressey misses Freestyle Skiing Big Air podium

Alberta’s Jake Sandstorm captured silver in the men Freestyle Skiing Big Air contest

Why do zebras have stripes? Perhaps to dazzle away flies

Researchers from University of Bristol look into why zebras have stripes

Poll: More voters believe Canada doing worse under Trudeau government

22 per cent believed the country is doing better and 27 per cent said things are the same

Ponoka host to Bayer Crop Science seed innovations trade show

The company held a trade show with seed crop science industry partners at the ag event centre

Peter Tork, Monkees’ lovable bass-guitar player, dies at 77

Tork, Micky Dolenz, David Jones and Michael Nesmith formed the made-for-television rock band

Most Read