During a science investigation using microscopes students recorded the following observations over their slide specimen: nucleus is present definite shaped organelles a cell wall Based on these observations, in which taxonomic domain should they classify this organism? Answer A Bacteria B Eukarya C Archaea D None of the above

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

2. how is heavy water different from normal water

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.