Atoms of which two elements in the ground state contain the same number of valence electrons?

What are transitions between a liquid and gas called? identify which way they are transitioning

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 statement goes against the kinetic theory of gases