Nitrogen is a diatomic element with five valence electrons. Create a module of a molecule of nitrogen.

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Which statement names the physical property of wood a. wood is softer than coal b. wood does not rust c. wood can rot d. wood can burn

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa