The best table. Period.
This is what we call the columns of the table.
What is groups?
This is the property of atoms that is steadily increasing as you go from left to right in the table.
What is the proton number/atomic number?
This unreactive gas is named after the Sun, where it is produced by nuclear fusion.
What is helium?
This is a very light (virtually massless) particle of negative charge.
What is an electron?
The modern periodic table was published in 1869 by this Russian chemist.
Who is (Dmitry Ivanovich) Mendeleev?
This is what we call the rows of the table.
What is periods?
Reactivity of elements is changing this way in alkali metals (Group 1).
What is increasing?
This is a yellowish metal with very low reactivity used in jewellery.
What is gold?
Even though we know of even smaller particles, this is the smallest unit of organized matter.
What is an atom?
Chemists die of poisoning or in explosions. This ended life of Antoine Lavoisier, the maker of the first table of elements.
What is execution (on guillotine)?
The number of the column is equal to number of this type of electrons.
What is the valence electrons?
Reactivity is changing this way in Halogen group (Group 7/17).
What is decreasing?
This group of elements contains completely unreactive species.
What is Noble gases (Group 8/18)?
Discovered by Rutheford in 1910, this atomic center contains 99% of an atom's mass.
What is the nucleus?
J. J. Thomson discovered electrons. Based on his discovery he devised this slightly peculiar and incorrect model of atom.
What is (plum) pudding model?
The number of the row of the table is equal to this property of the element's atom.
What is the number of electron shells?
The reactivity trend peaks in one most reactive element in the table.
What is fluorine?
This silvery metal is the least reactive amongst common metals and is used in car catalytic converters.
What is platinum?
Sodium atoms have atomic number of 11 and the mass number of 23. This is the number of neutrons they contain.
What is 12?
Johan Döbereiner believed elements could be assembled in these "groups of three".
What is triad?
Unknowingly, Mendeleev used this principle to place elements in the table.
What is the proton number/atomic number?
This trend was used by John Newlands to assemble elements in the table. Later on it was proven wrong as it does not increase continuously.
What is the atomic mass?
This unreactive metal came to Earth on an asteroid whose impact wiped out dinosaurs 65 million years ago.
What is iridium?
This subatomic particle was named after a non-sensical term from James Joyce's novel Ulysses.
What is quark?
Periodic system was worked out due to scientific intuition, a sudden insight, a "Heureka!". This was the exclamation coined by this ancient Greek philosopher.
Who is Archimedes?