Question

guys Please give exact answer for the below two questions

1) Define modern periodic law
2) What is effective nuclear charge​

Answer 1

the physical and chemical properties of elements are periodic function of atomic number is called modern periodic law

Answer 2

Answer:

i hope this will hepls you

Explanation:

1 ans) the modern periodic law can be stated as: "The physical and chemical properties of the elements are periodic functions of their atomic numbers ' the atomic number is equal to the number of electrons or protons in a neutral atom

inventor :Dmitri Mendeleev

2ans) The effective nuclear charge often symbolized as Zeff or Z* is the net positive charge experienced by an electron in a polyelectronic atom

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