Ms. Gratz went outside last night and saw a full moon as shown: Which moon phase would she see next?

Right now is waning gibbous on march 7 is waning crescent

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

Answer) by studying proton collisions hope this : )