An atom has 5 protons and 7 neutrons. what is its mass number?

Idon’t know how to solve this question

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this