What are the characteristic properties of each group?
a. noble gases
b. alkali metals
c. alkaline earth metals
Solution : Here, the goal of the problem is to identify the incorrect statement among the statements given and correct it. So let’s discuss each statement one by one and identify the incorrect statement and correct them. (a) The nucleus has most of the mass and comprises most of the volume of an atom : The above statement is False statement as nucleus has most of the mass but comprises least volume of an atom. The basic structure of any atom includes a nucleus made of protons and neutrons and a series of very small electrons which orbit around nucleus. Scientist Rutherford, using his -scattering experiment, postulated that mostof the v olume of an atom i s empty space in which electrons move around the nucleus. Hence we could say that the nucleus has most of the mass but comprises least volume of an atom. (b) Every atom of a given element has the same number of protons : The above statement is True. Different elem ents have different atomic numbers, but every atom of a given...