1. In a neutral atom, the number of neutrons and protons is equal.   True   False   2. The elements are arranged in order of decreasing atomic numbers in a table called the periodic table.   True   False   3. Atomic weight of an element is the mass of an atom of that element in grams.   True   False   4. An element is a substance made up of different kinds of atoms.   True   False   5. Atoms are electrically neutral.   True   False   6. Electrons are present in the nucleus.   True   False   7. Of a proton, neutron and an electron, the electron is the lightest.   True   False