Which type of radiation poses the fewest safety issues? A. Beta
B. Gamma
C. Alpha
D. X-rays

Which is a characteristic of mixtures?

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?