1) If an atom has 50 protons, what is its name?

1) If an atom has 50 protons, what is its name?
2) An atom has 20 protons, 21 neutrons and 20 electrons. what is its name? atomic number ? atomic weight ?
3) is this true or false, in a normal atom the number of neutrons is equal to the number of protons ?
4) what is the electron configuration for argon ? how many valence electrons in argon ?
5) given this electron configuration: 1s2 2s2 2p3 , what is the name of this atom ? how many valence electrons ?