An unknown element is a mixture of isotopes 120X and 122X. The average atomic mass of X is 120.37 amu. What is the percent
abundance of 122X?

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change. the substance changes to a new substance. the original substance can be recovered. the color changes. gas is produced and given off. the substance changes size, shape, or volume.