Neutrons are ________ particles having a mass equal to that of protons.
Neutrons are the particles with ___ electrical charge but have a mass of about 1 amu.
[Mention 0, +1 or -1]
Fill in the blanks :
(a) Dalton said that _______________ could not be divided.
(b) An ion which has a positive charge is called a _______________
(c) The outermost shell of an atom is known as _______________
(d) The _______________ of an atom is very hard and dense.
(e) Neutrons are __________________ particles having mass equal to that of portons.
(f) Isotopes are the atoms of __________________element having the __________________atomic number but __________________mass number.