Nuclear reactions

If a nucleus captures an electron and then emits an alpha particle, its atomic number a. decreases by 1 b. decreases by 2 c. decreases by 3 d. decreases by 4 e. remains constant

Nuclear reactions

If a nucleus captures an alpha particle, its mass number a. remains constant b. increases by 1 c. increases by 2 d. increases by 4 e. decreases by 2

nuclear reactions

If a nucleus captures an electron, its mass number a. remains constant b. decreases by 1 c. increases by 1 d. increases by 2 e. decreases by 2

Rate constant/half-life

What is the relationship between the rate constant and the half-life for a nuclear decay? k=??

A simple problem set of 10 simple, short first year problems.

I have attached the problem set in a word document. With one or two exceptions, all of the problems I believe are relativley simple, requiring no more than about 3 steps each. Thanks for the help. Just so you have an idea about the nature of the assignment without opening the attachment, the first two problems of the set are: 4. The term proof is defined as twice the percent of volume of pure ethanol in solution. Thus a solution that is 95% ethanol by volume is 190 proof. What is the molarity of ethanol in a 92 proof ethanol water solution? (density of ethanol is .8g/cm3; mol. wt. of ethanol is 46). 6. Find the mass percent of CuSO4 in a solution whose density is 1.3g/mL a... click for more