An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom? A. 39
B. 20
C. 58
D. 19

Afamily is one another name for a group on the table of elements.

In pea plants, the allele for tallness (t) is dominant to the allele for shortness (t). in the cross between a tall pea plant and a short pea plant shown below, what is the probability that the resulting offspring will be tall? whats the percent

Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.