Question

According to modern periodic law chemical properties of elements depends upon (i) atomic number (ii) mass number (iii) number of electrons (iv) number of neutrons​

Answer 1

modern periodic table based upon atomic number

Answer 2

Correct answer is (i) atomic number.

• The modern periodic law states that “The physical and chemical properties of the elements are periodic functions of their atomic numbers”.
• Thus, in modern periodic table, elements are arranged in increasing order of their atomic number.
• Atomic number of an element is equal to the number of protons in nucleus, which is further equal to the number of electrons of that element.