The atomic mass or mass number is determined by the number and atom has a. electrons b. neutrons and electrons c. protons and neutrons d. neutrons

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?

In 1816, john c. calhoun proposed that: a. that the federal government aid in the construction of roads and canals to improve transportation to and from the west b. the united states should end slavery. c. the united states should increasing the size of the navy and invade central america. d. the united states should annex hawaii

One of galileo’s contributions to science was a creating the coordinate plane system. b developing the scientific method. c improving the telescope. d inventing the astrolabe.