To write a valid chemical formula what must be true?

Which are causes of mechanical weathering? check all that apply. oacid raino plant growtho animal actionso carbon dioxideo pressure release

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 are the two largest greenhouse gases