![]() Lanthanides series starts with Lanthanum which is placed in group 3 and period 6. Elements having atomic number between 58 to 71 are called Lanthanides. ![]() There are two series of these elements “Lanthanides” and “Actinides”. Elements placed at bottom of the periodic table are called as inner transition elements. These element contains two incomplete outermost shells. Their outermost shell is incomplete.Įlements of the groups from 3 to 12 are called as transition elements. Metals are arranged on left hand side of modern periodic table while non metals are arranged in right side.Įlements of the groups 1 and 2 and from 13 to 17 are called as normal elements. Noble gases has completely filled outermost shells. Group 17 has halogens and Group 18 has noble gases. Group 1 consists alkali metals, Group 2 contains alkaline earth metals. The seventh period is incomplete period.Įlements of same group have equal electrons in their outermost shell. Sixth period consists of 32 elements and called as the longest period. Fourth and fifth period has 18 elements so called as long periods. The second and third period contains 8 elements hence these are called short periods. The first period has only two elements hence it is the shortest period. Elements are placed based on their atomic number. There are 18 vertical columns known as ‘groups’ and 7 horizontal rows called ‘periods’ in the modern periodic table. Position of Elements in Modern Periodic Table
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |