Atoms that have the same number of valence electrons in their outer shell

Which of these scientists diagnosed smallpox and measles? A. Nicolaus Copernicus B. Al-Razi C. Archimedes D. Rosalind Franklin

Aluminum burns in bromine producing aluminum bromide in a certain experiment, 6.0 g aluminum was reacted with an excess of bromine to yield 50.3 g aluminum bromide calculate the theoreteical and percent yields.

A 325 ml sample of gas is initially at a pressure of 721 torr and a temperature of 32°c. if this gas is compressed to a volume of 286 ml and the pressure increases to 901 torr, what will be the new temperature of the gas (reported to three

The irems amenable to detection by soft x-rays are

Lisa's doctor tells her that she needs to eat more foods that contain calcium to maintain her bone health. What could happen if Lisa doesn't follow her doctor's orders?

Consider these statements regarding the body's inability to convert fat to carbohydrates. Select each statement that is true. 1. Acetoacetate is a normal, major energy source for the brain, heart muscle, and renal cortex. 2.

Which is the best term to use describing the energy of position

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Write a net ionic equation for the overall reaction that occurs when aqueous solutions of phosphoric acid (h3po4) and potassium hydroxide are combined. assume excess base. use the pull-down boxes to specify states such as (aq) or (s).

What are the coefficients that will balance the skeleton equation below? n + h ⟶ nh?