Based on the Lewis/electron dot representation

of the two atoms, predict the ratio of metal

cationic (+) atom to nonmetal anionic (-) atom in

the compound.

. Ca:

A. 1:1

B. 1:2

C. 2:1

D. 3:1

How many nuclei of 238 92 U 92 238 U remain in a rock if the activity registers 290 decays per second? (Note that the half life of Uranium-238 is 4.468x109 years)

What is the correct ionic charge of an atom that gained 3 electrons?

Beta radiation is: in some ways safer than alpha radiation because it ionizes less than alpha radiation easier to block than alpha radiation similar to a helium nucleus the only physical particle that atomic nuclei can emit

What elements are found in all hydrocarbons? What elements are found in all hydrocarbons? a. hydrogen and helium c. hydrogen and carbon b. carbon and oxygen d. nitrogen and carbon

A certain compound has an empirical formula of nh2o. its molar mass is between 55 and 65 g/mol. its molecular formula is

A solution is prepared by dissolving 0.7236 g oxalic acid (H2C2O4) in enough water to make 100.0 mL of solution. A 10.00-mL aliquot (portion) of this solution is then diluted to a final volume of 250.0 mL.

In a container filled with one mole of helium and one mole of nitrogen the pressure in the container is primarily?

Which type of property of matter can be observed without changing the composition of the substance?

Who were the scientists who won the nobel prize for the atomic model?

Heat measures the average kinetic energy a substance's molecules. TRUE FALSE