Z=20; 1s22s22p63s23p6 express your answer as an Ion

How would you determine the volume of an object if you were given its mass and density?

Which one of the following has the highest standard molar entropy at 25 degrees c? A) NaBrB) NaFc) NaCld) NaIe) they have the same value

The atomic radii of Li, Na, and Rb are 152 pm, 186 pm, and 244 pm, respectively. What is a reasonable estimate for the atomic radius of K? Group of answer choices 231 pm 105 pm 268 pm 163 pm

What are the five rules for significant figures? Give some examples

What is the measure of how hot or cold the air is

Xander is gaining weight. Which best describes what he can do to prevent obesity? exercise every day and also make healthy choices in his diet excercise once a week but make no change in his diet exercise once a week and also make healthy choices in

The town in the video stressed using locally made goods instead of imported goods. How could using locally made goods lower CO2 emissions?

Calculate the ΔHrxn for the following reaction: CH4 (g) + 2Cl2 (g) - - > CH2Cl2 (g) + 2HCl (g) Use the following reaction and given ΔH's: CH4 (g) + Cl2 (g) - - > CH3Cl (g) + HCl (g), ΔH = - 99.

Select all that apply to diffusion. A solid cannot diffuse in to another solid. Solids can diffuse in liquids. Liquids can diffuse in liquids. It is the process of intermingling atoms from one substance into another.

We are all familiar with the general principles of operation of an internal combustion engine: the combustion of fuel drives out the piston.