How does an atom of bromine-79 become a bromide ion with a -1 charge?
a. the atom loses 1 proton to have a total of 34
b. the atom loses 1 protron to have a total of 78
c. the atom gains 1 electron to have a total of 43
d. the atom gains 1 electron to have a total of 36

Apositive rod is placed to the left of sphere a, and the spheres are separated. which best describes the spheres? sphere a is negative and sphere b is positive because protons from sphere a are attracted to the rod and move to sphere b. sphere a is negative and sphere b is positive because electrons from sphere b are attracted to the rod and move to sphere a. sphere a is positive and sphere b is negative because electrons from the rod move to sphere b and protons then move to sphere a. sphere a is positive and sphere b is negative because protons move from sphere b to the rod and also to sphere a.

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Awalk up the phase change graph worksheet