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How do you find the group and period of an element?
The period of an element corresponds to the principal quantum number of the Valence shell. The block of an element corresponds to the type of orbital which receive the last electron. For s-block elements, group number is equal to the number of valence electrons.
How do you find the group and period of an element in class 10?
Valence Electron — Group 1. Valence Electrons — Group 2. To 8 valence electrons — Add 10 to the valence electrons to get the group number of the element.
How do you find the period and group of elements in Class 10?
Valence Electron — Group 1. Valence Electrons — Group 2. To 8 valence electrons — Add 10 to the valence electrons to get the group number of the element.
How do you find the electron configuration of a group?
The group of an element is predicted from the number of electrons in the valence shell or/and penultimate shell as follows: a)For s block elements, group number is equal to the number of valence electrons. b) For p block elements, group number is equal to 10+number of electrons in the valence shell.
What is group number in periodic table?
Group (periodic table) A group is any column on the periodic table. Elements in the same group usually have similar properties, because they have the same number of electrons in the outermost electron shell. There are eight main groups of elements, numbered 1, 2, and 13-18.
What is group and period in periodic table?
Groups and periods are two ways of categorizing elements in the periodic table. Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.
What is a group in the periodic table?
A group is any column on the periodic table. Elements in the same group usually have similar properties, because they have the same number of electrons in the outermost electron shell. There are eight main groups of elements, numbered 1, 2, and 13-18. Group 1: the alkali metals (lithium family) *not including hydrogen.
How many groups and periods are on the periodic table?
There are 18 groups and 7 periods in the modern periodic table. (a) The atomic size and metallic character of elements increase down a group. (b) The atomic size and metallic character of elements decrease from left to right in a period. The number of periods is 7 and the number of groups is 18.
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