What sort of reaction happens when a hydrogen-2 atom and a hydrogen-3 atom are converted to a helium-4 atom?

fission

fusion

chemical

ionic

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?

Compare and contrast physical changes with chemical changes.

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?