What is the difference between isotopes. A. number of protons

B. number of neutrons

C. number of quarks

D. number of electrons

Please help ASAP please RIGHT answer pleasee

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.