Q4 SCIENCE (DEVELOPMENT OF PERIODIC TABLE)

was one of the early-discovered elements because it exists in its elemental form

(clue: au)

Around 1800 there were __ elements discovered

By 1865 this number increased to __

He grouped the elements in a triad and increasing mass.

He was the one who create the first periodic table

John Newland's observation was that the properties of the elements would recur at the eighth element calling it the ___?

In 1869 two scientist named D___ I___ M____ and J___ L___ M____ made observations of elements that have the same chemical & physical properties

It was M_____ who insisted that elements with the same characteristics had to be in the same group.

He left blank spaces in his chart for his chart for his predicted elements that were undiscovered during his time yet.

Physicist named H____ M____ arranged the elements in increasing atomic number