What is an atom and an element

Which of the following has more kinetic energy? A car traveling 60 miles per hour. Or A car traveling 30 miles per hour.

Earth's fresh water can be found in bodies of water that provide people with drinking water and recreational sites. rivers, lakes, streams, and wetlands. These also play a role in maintaining a healthy ecosystem.

If the first set of reactants is NH4OH and KAl (SO4) 2 and the second set of reactants is MgSO4 and NH4OH, is either reaction considered a synthesis reaction as labeled in the laboratory? Why or why not?

Which of the following is a possible ground-state electron configuration? [Xe] 6s24f145d106p2 [Kr] 5s24d85p3 [Xe] 6s25d106p4 [Kr] 5s25d105p5

Why is mRNA able to leave the nucleus and not DNA?

Which two of the following elements would you expect to be most similar: nitrogen, chlorine, barium, fluorine, and sulfur?

Which statement best describes control rods? They are unmovable pieces. They are inert. They supply neutrons to start the nuclear chain reaction. They drive the generator

A large rift valley can be found along the east coast of Africa. It has been slowly widening over time, and it is now wide enough to contain many large lakes. Which of these best explains the slow widening of this rift valley over time? A.

How does the density of aluminum compare with the density of gold

Which of the following provided a hypothesis as to how the universe began? A) the moon collision theoryB) the big bang theoryC) the antimatter theoryD) the molten theory