Which choice below represents a negative impact that chemistry has on society? O development of cancer treatment drugs
O development of Teflon, the nonstick material used in cookware
combustion of car engines producing pollutants in the air
O the development of nuclear power plants used to produce electricity

Which factor is likely to impact the possible number of compounds? presence of unlimited number of elements in the periodic table the inability of atoms to align perfectly with other atoms the ability of all elements to react with every other element all elements being equally reactive

Avogradoa number was calculated by determining the number of atoms in?

Can anyone explain 1. review your spectrometry data and use the known elements to identify the star's composition. which unknown elements make up this star? justify your element selections. 2. in parts i and ii of the lab, what happened to the electrons of each element to produce the different colors of light? explain your answers using important terms from the lesson and information provided in the laboratory. 3. stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. based on your data, is the newly discovered star a younger star? explain your answer.