IB Chemistry 3.1 Periodic Table

Metals

________ are good conductors of heat and electricity, malleable, ductile, and lustre.

Dmitri Mendeleev

________ formed The Periodic Law: When elements were arranged in order of atomic mass, repeated properties were found.

J.W. Dobereiner

________ formed the Law of Triads: A link between the atomic weight and distinct elements in groups of threes.

Henry Moseley

________ formed the Modern Periodic Law: When elements were placed in atomic number, there were patterns of properties.

Nonmetals

________ are poor conductors.

Deductive Reasoning

________: Start at a theory and test the theory.

Inductive Reasoning

________: Definite measurements and observations lead to the acknowledgement of patterns, which can lead to a hypothesis and later a theory.

Dobereiner formed the Law of Triads

A link between the atomic weight and distinct elements in groups of threes

Newlands formed the Law of Octaves

The properties in every 8th element were similar; E.g

Mendeleev formed The Periodic Law

When elements were arranged in order of atomic mass, repeated properties were found

Moseley formed the Modern Periodic Law

When elements were placed in atomic number, there were patterns of properties

Inductive Reasoning

Definite measurements and observations lead to the acknowledgement of patterns, which can lead to a hypothesis and later a theory

Deductive Reasoning

Start at a theory and test the theory

Group 1

Alkali Metals

Group 2

Alkaline Earth Metals

Group 15

Pnictogens

Group 16

Chalcogens

Group 17

Halogens

Group 18

Noble Gases

Metalloids

Ba, Si, Ge, As, Sb, Te, At

J.A.R. Newlands

______Formed the Law of Octaves: The properties of every 8th element were similar; e.g. F, Cl