An atom or a group of atoms possessing a positive or negative electrical charge is called a (n

A.) molecule

B.) compound

C.) element

D.) ion

What structural units make up network solids? O A. Nonmetal atoms O B. Molecules O C. Metal atoms O D. lons

Which of the following is the correctly balanced chemical equation for the reaction of Ca (OH) 2 and HNO3?

Which part of a plant must be fertilized in order for a fruit or vegetable to grow? A. egg B. leaf C. sepal D. stem

What is the concentration, in grams per liter, of a solution prepared by dissolving 0.00040 mol HCl in 2.2 L H2O? Assume that the volume of the solution does not change when the HCl is added.

What causes the earths crust to spread

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?

Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits. True False

There is a large increase in ionization energy between the second and the third ionization energies of a metal. What kind of ion is the metal likely to form? Include the charge in your answer.

Which of the following are true statements about equilibrium systems? For the following reaction at equilibrium: CaCO3 (s) ⇌ CaO (s) + CO2 (g) adding more CaCO3 will shift the equilibrium to the right.