An atom that has lost or gained electrons is known as an ion. Which compound below is made up of ions?

How does your body respond differently the second time it is exposed to a pathogen than the first time it was exposed to the same pathogen?

Determine the molecular weight for mg (no3) 2. 134.32 g 118.32 g 148.33 g 172.64 g

What factors affect the rate of dissolving a solid in a liquid? Explain ...

The landscape feature that forms when plate movement forces the crust to bend downward is a ...

Potassium (K) combines with magnesium bromide (MgBr2) to form potassium bromide (KBr) and magnesium (Mg) during a chemical reaction.

Which of the following actions will not increase the rate at which a solid dissolves in a liquid? A. increasing the surface area of a solid B. stirring the solid and the liquid C. increasing the amount of the solid D.

Does the amount of heat absorbed as 1 kg of saturated liquid water boils at 100°C have to be equal to the amount of heat released as 1 kg of saturated water vapor condenses at 100°C?

F. Protection of the body from infectious organisms is accomplished by which of these tissues? a) bone; b) muscle; c) nerve; d) blood

A compound that is composed of molybdenum (Mo) and oxygen (O) was produced in a lab by heating molybdenum over a Bunsen burner. The following data was collected: Mass of crucible: 38.26 g Mass of crucible and molybdenum: 39.

Which of the following elements has electrons in the 3d sublevel?