because a group of elements in the Periodic Table behave in a single manner.they have a similar kind of physical properties,i can't surely tell about the chemical properties but in some exceptions these chemical properties are also same.
because the periodic table it basically the table of element meaning where all elements are named
Elements with similar electron configurations are placed in the same group.
Those are called groups or families and they are placed there because they all react in a similar fashion.
The elements in the same group have the same number of valence electrons and hence similar chemical and physical properties.
Elements in same period have same shells. The properties also vary systematically in periods.
This is a consequence of the law of periodicity of chemical properties of elements.
BECAUSE of the properties
No. No two elements have the same chemical properties. However, the chemical properties of fluorine and chlorine are similar. Since they are similar, they are placed in the same group, group 17, on the periodic table.
The elements K and Na belong to the same group i.e. 1 of the periodic table. However they are separately placed in 4th and 3rd periods respectively.
No. Elements in the same group have same number of valence electrons.
Lithium and potassium has same properties as sodium.They are alkali metals.They are placed in group-1.The elements of the same group have same chemical properties. Li and K are the elements above and below Na in the period. So they have same properties as sodium.
Hydrogen is placed in the metal group because it only needs to lose one electron to be stable just like lithium, sodium, potassium etc It also has the same number of valence electrons as the rest of the elements in group 1a. :)
Elements with similar electron configurations are placed in the same group.
Same number of valence electrons cause same properties. The elements with same properties are grouped together. For example- the alkali metals are placed in group-1
Mendleef arranged the elements in the increasing order of their atomic masses due to which elements having same properties were placed in the same group and there were few exceptions.
elements are in the same group since they react similarly to other elements in that group.
elements that share the same colum
K refers to potassium. it is placed in alkali metal family i.e. group 1. Calcium is placed in alkaline earth family i.e group-2.
Elements in group have same number of valence electrons. They also have same chemical properties.
No. No two elements have the same chemical properties. However, the chemical properties of fluorine and chlorine are similar. Since they are similar, they are placed in the same group, group 17, on the periodic table.
The elements K and Na belong to the same group i.e. 1 of the periodic table. However they are separately placed in 4th and 3rd periods respectively.
Same elements of group have same valency. They possess same chemical behaviour.
Elements in the same group have similar physical and chemical properties.
No. Elements in the same group have same number of valence electrons.