What is mass number of an element ? How is the mass number related to the protons and neutrons present in the nucleus of an atom ? Is it same as atomic number ?
How are the atomic number and mass number related to the number of neutrons and protons inside an atom?
What is mass number of an element? How is the mass number related to the protons and neutrons present in the nucleus of an atom?
Which of the following are true for an element?
(i) Atomic number = number of protons + number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic mass = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons
If an atom of an element contains 17 electrons and 18 neutrons, find the number of protons, atomic number and mass number of the element.