Please help with 8th grade chemistry i'm behind and its way overdue
The Law of Conservation of Mass can be used to predict the mass of the products in a chemical reaction. Which of the following would be most helpful in making this prediction?
a. the type of chemical reaction
b. the number of reactants involved
c. the mass of the reactants
d. the names of the products

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?