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What is electronegativity? What are the periodic trends in electronegativity?
What is the pH of a buffer when the concentrations of both buffer components (the weak acid and its conjugate base) are equal? What happens to the pH when the buffer contains more of the weak acid than the conjugate base? More of the conjugate base than the weak acid?
What is the law of conservation of energy? How does it relate to energy exchanges between a thermodynamic system and its surroundings?
What is heat capacity? Explain the difference between heat capacity and specific heat capacity.
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So for the next problem will be calculating the number of neutrons, electrons and protons for the calcium count on eso start. We can first calculate the number of protons because this is just the atomic number. Eso for calcium. According to the Pew Rock table, it has 20 protons. So that is pretty easy to figure out on dso to figure out the number of neutrons we need to use. Our formula of number of neutrons is equal to the atomic weight of your Adam subtracted by the atomic number or number of protons. So the atomic weight well, calcium is 40. So then if you subtract 20 you will get 20. Which means that there are warning neutrons in calcium. So for a neutral Adam, the number of protons should equal the number of electrons. Um, but in this case, we're trying to figure out the number of electrons for calcium two plus s. So that means that urgently we have Tony electrons, but because it has a plus to charge, that means that the calcium is deficient by two electrons. So that means we need to subtract two to obtain they not charge of plus two, which means that there are 18 electrons. So for the answer to this problem, calcium two plus has 20 protons, 20 neutrons and 18.
Chemical reactions and Stoichiometry
Periodic Table properties