Row 1
How many elements are on the periodic table of elements?
118
Who was the first chemist to try grouping elements?
Antoine Lavoisier. He tries grouping them as metals and nonmetals.
Who created the "frame work" for the periodic table of elements?
Dimitri Mendeleev
What are the horizontal rows called? What are the horizontal columns called?
Periods. Groups
How did John Jacob classify elements?
Using their inital of their latin name
How did Henry Mseley measure wavelengths and atomic number of elements?
He used an X-ray.
What German physicist observed physical and chemical properties and arranged them into three groups?
Johann Wolfgang Dobereiner. He arranged them into atomic weights (triads), observation of properties of the middle element, and approximate value of each property in the other two triads.
What is the 101st element and who is it named after?
Mendelevium, Dmitri Mendeleev
When was the first periodic table organized?
1896 by Dimitri Meeldeev
When did the idea of elements first start to take palce?
Over/around 5,000 years ago around 300 BC
What elements are in the vertical columns?
Elements with similar chemical properties
Who started arranging elements in order of atomic mass?
John Newlands
How many elements did John William Strut (Lord Rayleigh) discover?
6
When was the table most recently updated?
2018
What Greek philosopher had the idea that the Earth was made up of elements?
Aristotle
Why was 2019 the International Year of the Periodic Table?
It was the 150th anniversary of Dmitri Mendeleev's periodic table publcation.
What was the first artifical element?
Technetium
What noble gasses did John William Strutt(Lord Rayleigh) discover?
Helium, neon, argon, krypton, randon, and xenon.
What is the number that of elements that the periodic table might not be able to accept more thean?
137 elements
How many extra elements were added to Mendeleev's original periodic table?
More than 40
How many elementds did Antoine Laiser classify?
33
What is the law of Triads that Wolf Gang propsed?
Certain elements with similar properties could be grouped into threes
How often were atomic mass proprties repeated? What is this therory called?
Every 8 elements. The law of Octaves or the periodic law
Who in the 20th century discovered and element made of ___ number of protons?
Glenty Saborg, transuranic elements with more than 92 protons.
How many elements were discovered between before 1800 and 1999?
109 elements