Arrange the following statements in a sequence which involves the calculation of the atomic number and mass number for an atom of an element with 15 electrons and 16 neutrons. (a) A=Number of protons + Number of neutrons A=Z+ Number fo neutrons A=15+16=31(b) Number of protrons and number of electrons are equal in a neutral atom. Hence the atomic number Z is equal to 15. (c) Mass number is equal to the total number of protons and neutrons. (d) Atomic number is 15 and mass number is 31.

Arrange the following statements in a sequence which involves the calc

1.	Arrange the following statements in a sequence which involves the calculation of the atomic number and mass number for an atom of an element with 15 electrons and 16 neutrons. (a) A=Number of protons + Number of neutrons A=Z+ Number fo neutrons A=15+16=31(b) Number of protrons and number of electrons are equal in a neutral atom. Hence the atomic number Z is equal to 15. (c) Mass number is equal to the total number of protons and neutrons. (d) Atomic number is 15 and mass number is 31.
Answer» b d c a b c a d c b a d c b d a Solution :(i) NUMBER of protons and number of electrons are equal in a NEUTRAL atom. Hnce atomic number 'Z' is equal to 15. (ii) Mass number is equal to the TOTAL number of protons and neutrons. (iii) A = Number of protons + Number of neutrons A = Z + Number of neutrons A = 15 + 16 = 31 (IV) Atomic number is 15 and mass number is 31.