Objects when dropped accelerate toward the center of the earth Law Theory or Hypothesis?​

What does x represent in the formula for the compound xcl4?

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule