Of Be3+, Li2+, and He1+

, which would have a line spectrum most similar to that of

thehydrogen atom? Explain your reasoning.

Alex wants to learn about materials. what question could he ask that could he answered by doing a scientific investigation?

Without looking at the periodic table write the expected outer electron configuration for each of the following elements: A. Group 7, fourth period B. Group 3, fifth period C. Group 12, sixth period

Which of these is a compound? A. salad B. carbon dioxide C. potassium D. salt water

A certain reaction has the form aA → bB. At a particular temperature and [A]0 = 2.80 * 10-3 molar, data was collected of concentration versus time for this reaction. A plot of 1/[A]t versus time resulted in a straight line with a slope value of 3.

An element has an atomic number of 29. The number of protons and electrons in a neutral atom of the element are * A. 58 protons and 29 electrons B. 29 protons and 0 electrons C. 15 protons and 14 electrons D. 29 protons and 29 electrons

Which element is present in all amino acids but not necessarily in fats or carbohydrates?

Describe the attractive forces and repulsive forces that exist between two atoms as the atoms move closer together

A bag of gum drops contains 14 orange gumdrops, 8 yellow gumdrops, and 12 black gumdrops. What is the percentage of yellow gumdrops?

Gases and liquids will both expand to fill their container. True False ... ?

Which of the following best explains why electrometallurgy is a useful process in many industries? A.) Electrometallurgy can etch permanent marks and designs into the surfaces of metal products. B.