Question

all about modern perodic table​

Answer 1

in modern periodic table atoms are classified according to atomic no. there are groups and periods in modern periodic table in modern periodic table there are 18 groups and 7 periods all elements are positioned with the same nature elements group 18 represents the noble gases there are two different elements below the periodic table they are lathnacide series belonging to period 6 and actnide series belonging to period 7 to know the group and period of an element we need to find the number of shells (for periods) and number of electrons in last shells (for groups)

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Answer 2

Answer:

The modern periodic table is used to organize all the known elements. Elements are arranged in the table by increasing atomic number. In the modern periodic table, each element is represented by its chemical symbol. ... Rows of the periodic table are called periods.