Groups 1a-8a of the Periodic Table have predictable and similar properties. This is because each of the elements in the same group have the same amount of electrons to gain or lose in their outer shells. Take Li, Na, K etc (alkali metals for instance, group 1). These are all metals that oxidise when air hits them. When placed in water they react violently.
by their charcaterics,properties,and names
Wubbous!
A column of elements in the periodic table is called a group or
colour of the elemrnt
Noble Gas
A periodic trend is a regular variation the properties of an element with increasing atomic number.
Lanthanides have properties similar to Cerium
The Periodic Table
The Periodic Table
They change with atomic number.
A column of elements in the periodic table is called a group or
Periodic Table was constructed by using electronic configuration . Elements have same outer shell electronic configuration were in same group . So they have similar chemical properties . If an unknown element will register in future , its properties are predicted with the help of its outer shell configuration.
Periodic table was constructed by using electronic configuration . Elements have same outer shell electronic configuration were in same group . So they have similar chemical properties . If an unknown element will register in future , its properties are predicted with the help of its outer shell configuration.
colour of the elemrnt
Noble Gas
Atomic number, the number of protons, and the similarity of chemical properties
It can't. the properties of an element determine it's group placement, without knowledge of these properties (or, indeed, the element itself) it would be impossible to place an element in it's proper place on the periodic table.
Dmitri Mendeleev created the periodic table in an effort to assist his students, who until then, would learn the properties of each known element individually. He organized them according to their atomic number, and left spaces where he predicted other elements should be. These spaces were filled as ore elements were discovered.
Each element is placed according to the increasing order of their atomic number and repeating properties.