CHEM part 2

He proposed a system of classification in which the elements are arranged in the order of increasing atomic masses.

• John Newlands

• Lothar Mayer

• John Pasteur

• Dmitri Mendeleev

John Newlands said that there is a repetition of element for every _____ element

• seventh

• ninth

• eighth

• sixth

elements are arranged in order of their increasing atomic mass, the properties of every eighth element are similar to the first

• periodic law

• Law of octaves

• Law of multiple proportions

• Ideal gas law

German Chemist, he devised a classification of the elements into a table that accounted for the periodic variations in properties. His table included 56 elements.

• Johann W. Döbereiner

• John Newland

• Dmitri Mendeleev

• Lothar Mayer

Russian Chemist, he arranged the elements in the order of atomic weights/masses. creator of the periodic table

• Isaac Newton
• Marie Curie
• Dmitri Mendeleev
• Albert Einstein

German chemist, he showed that the atomic mass of strontium lies midway between those of calcium and barium. also showed triads also exists in halogens.

• Johann Wolfgang Döbereiner
• John Pasteur

• Lothar Mayer

• Albert Einstein

He expanded Döbereiner’s suggestions by showing that similar relationships extended further than the triads of elements. Fluorine was added to the halogens, and magnesium to the alkaline-earth metals

• J.P. Cooke

• J.P Cokee

• J.P Curie

• Henry Moseley

He determined the atomic number of elements based on their atomic spectrum. This discovery eventually became the Modern Periodic Law.

• Henry Moseley

• J.P. Cokee

• Johann W. Döbereiner

• Dmitri Mendeleev

The vertical columns in the periodic table that signify the number of valence electron in an element.

• Group

• Family

• Period

• Atomic Number

The horizontal rows in the periodic table that signify the number of electron shells in an element.

• family

• group

• period

• atomic mass