3.2 Development of periodic table

A tabular arrangement of the chemical elements by increasing atomic numbers

Periodic table

States that when elements are arranged in order of increasing atomic number,their physical and chemical properties show periodic patterns

Periodic law

Groups to be designated by the numerals 1-18

IUPAC

Refers to the level of reactivity of a metal

Metallic

Referd to the tendency yo accept electrons during chemical reactions

Nonmetallic

The assignment of all the electrons in an atom into specific shells and subshells

Electron Configuration

G7A known as___

Halogens(salt-former)

Elements that has properties that are intermidiate between those of metals and non metals

Matalloid

Gasses that are generally non reactive due to their full filled valence shell

Noble gases

They don't conduct electricity well. They are insulators; It can be gasses liquidsor solid

Nonmetals

D- block elements metal with typical metallic properties are called

Transition metals

Group 3B&4B in the 6th&7th periods are called

Inner transition elements

Are shiny metals similar in reactivity to the group 2A

Lanthanides

They are all radioactive.

Actinides