Alpha-emitting substances, such as radon gas, can be a serious health hazard only if?

A.

they are inhaled or eaten.

B.

their radiation strikes the skin.

C.

exposure to them is external.

D.

none of the above

Under the Implied Consent law, which of the following is true? A. Your driving privileges will be suspended if you refuse a chemical test to measure your alcohol level. B.

Where can you find atoms

How many moles of solute do you need to make one liter of a 1.25 mol/L ammonium hydroxide solution

Which of the following solutions will behave closest to an ideal solution?

How to determine endothermic and exothermic reaction using delta h?

According to Neil's Bohr's atomic model, what occurs when an atom absorbs radiated energy? A) an electron shifts from a lower energy to a higher one B) an electron shifts from a higher energy lever to a lower one C) an electron spirals towards the

Which is true about dissolving a polar substance in water? A) the solvent particles are all nonpolar molecules B) the solute particles are carried into the solution C) the solute particles have no attraction for the solvent molecules D) the solute

Which societal problem can be solved, in part, by scientists identifying areas of high biodiversity? A. reducing the amount of pollution B. finding affordable housing C. protecting the environment D. providing access to clean water

Brianna wanted to compare the densities of two different solids of the same size 6cm3 (same volume) to see which one was more dense. Solid A had a mass of 2 grams and Solid B had a mass of 0.5 grams.

Which type of bond is present within a water molecule