Si el átomo x es isoelectrónico con 20Ca2+ e isótono con 32/16s. Hallar el numero de masa de x

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?