Chemistry

Theory of Triads in 1829

• John Newlands

• Dmitri Mendeleev

• Johann Dobereiner

• Henry Mosely

He drew up the final table of the known elements of his time by arranging the elements in order of increasing atomic weight

• Dmitri Mendeleev

• Johann Dobereiner

• Henry Mosely

• John Newland

When did you know if elements had similar physical and chemical elements?

• Every 9th

• Every 8th

• Every 7th

• Every 6th

States that the properties of elements vary periodically with atomic number

• Periodic law

• Periodic table

Is a tabular display or arrangement of the chemical elements

• Periodic Law

• Periodic Table

Discover that the positive charge in the nucleus of an atom of any elements is of a definite amount

• Dmitri Mendeleev

• Henry Mosely

• Johann Dobereiner

• John Newlands

Law of octaves

• Johann Dobereiner

• John Newlands

• Dmitri Mendeleev

• Henry Mosely

Relates to how easy it is for an atom to loose an electron

• Reactivity

• Matalic property

• Non-metalic property

It Is the case and speed with which a metal reacts with another substance is called?

• Metalic Property

• Non-metalic property

• Reactivity

Relates to how it is for an atom to gain an electron

• Reactivity

• Metalic Property

• Non-metalic property