What are the horizontal rows of the periodic table called

Convert the following names to balanced formulas. lead (IV) sulfide why is it not Pb2S4?

Ava and Eddy are discussing the difference between a species being extinct and an endangered species. Ava states that extinction means that the species is no longer alive. Eddy states that extinction is when a species is close to dying out.

Only six elements make up 99% of the human body's mass. The six elements are A. carbon, oxygen, hydrogen, nitrogen, calcium, and sodium. B. carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus. C.

Heat required to raise 1 g of a substance 1°C

How do you calculate the number of neutrons in an atom?

What happens to the carbon atoms lost during respiration?

Uses of iron oxide in nanotechnology (biomedicine)

Organic chemistry is the study of compounds containing A. carbon. B. nitrogen. C. hydrogen. D. oxygen.

Explain why fermentation would occur in your muscle cells as opposed to cellular respiration.

How do intra-specific and inter-specific relationships within a community maintain biodiversity by preventing competitive exclusion?