List the number of protons, neutrons, and electrons in each pair of isotopes.

a. 6/3Li, 7/3Li

b. 42/20Ca, 44/20 Ca

c. 78/34Se, 80/34Se

Which statement is correct about the reaction that occurs between sodium hydroxide and hydrochloric acid? It is a single replacement reaction because two new compounds of sodium and chlorine are formed.

What is the name of the gap between two communicating neurons?

How is blood different after it is pumped through the gills? Select all that apply. It has less carbon dioxide than when it entered the gills. It has more oxygen than when it entered the gills.

Describe the proportion of elements in minerals that contain more than one element.

When a nonpolar liquid displays a convex meniscus, which of the following explains this behavior? A) It has a low surface tension, and therefore clings to the glass. B) The cohesive forces are stronger than the adhesive forces to the glass.

What would be the total mass of the products of a reaction in which 25 grams of table salt decomposes into the elements sodium and chlorine?

The nucleus of a Helium atom has a charge equal to twice the proton's charge. Let FN denote the magnitude of the force the Helium nucleus exerts on one of the electrons in a Helium atom, and let Fe denote the magnitude of the force one electron in

What can you say about the past four decades?

Calculate the percent yield for the reaction above if 25.0 grams of H2SO4 was actually produced and the theoretical yield was predicted to be 42.0 grams. (% yield = Actual / theoretical x 100) SO3 (g) + H200 H2SO4 (9) O 59.5 O 168 O 0.595 O 1.68

Why does hot water freeze faster than cold water?