9. Which zone of a flame does a goldsmith use for melting gold and silver and why?

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?

Table sugar completely dissolved in water is an example of a?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?