Mrs. Eleanor Roosevelt, (United States) holding a Declaration of Human Rights. Â© UN Photo. The formal inception of Human Rights Day dates from 1950, after the Assembly passed resolution 423 (V) inviting all States and interested organizations to adopt 10 December of each year as Human Rights Day.he formal inception of Human Rights Day dates from 1950, after the Assembly passed resolution 423 (V) inviting all States and interested organizations to adopt 10 December of each year as Human Rights Day.
The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).
An atom is always charge less i.e it is neutral. An atom always refers to a single element. The atomic number of an element refers to the number of protons or electrons in it. This is because an atom always has equal number of electrons and protons. Protons are positively charged while electrons are negatively charged. Atoms also contain neutrons which are neutral. Proton, neutron and electron are called sub atomic particles. Neutrons and protons are called nucleons since they are in the nucleus of the atom. Charged species are called ions.