Thorium-228 naturally decays into radon-224 by emitting an alpha particle.
Based on this, what can we say about this change?

What layer of the atmosphere is directly above the troposphere?

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?

What is the mass of 0.46 mol of mgcl2