?Predict the chemical formulas of the compounds formed by the following pairs of ions: (a) \(\mathrm{Cr}^{3+}\) and \(\mathrm{Br}^{-}\),

Step 1 of 5) Predict the chemical formulas of the compounds formed by the following pairs of ions:Atoms are the basic building blocks of matter. They are the smallest units of an element that can combine with other elements. Atoms are composed of even smaller particles, called subatomic particles. Some of these subatomic particles are charged and follow the usual behavior of charged particles: Particles with the same charge repel one another, whereas particles with opposite charges are attracted to one another. We considered some of the important experiments that led to the discovery and characterization of subatomic particles. Thomson’s experiments on the behavior of cathode rays in magnetic and electric fields led to the discovery of the electron and allowed its charge-to-mass ratio to be measured. Millikan’s oil-drop experiment determined the charge of the electron. Becquerel’s discovery of radioactivity, the spontaneous emission of radiation by atoms, gave further evidence that the atom has a substructure. Rutherford’s studies of how a particles scatter when passing through thin metal foils led to the nuclear model of the atom, showing that the atom has a dense, positively charged nucleus.The atomic mass scale is defined by assigning a mass of exactly 12 amu to a 12C atom. The atomic weight (average atomic mass) of an element can be calculated from the relative abundances and masses of that element’s isotopes. The mass spectrometer provides the most direct and accurate means of experimentally measuring atomic (and molecular) weights.The periodic table is an arrangement