NATS 1945 Lecture Notes - Lecture 1: Helium Atom, Hydrogen Atom, Atomic Number
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Assigned reading: muller (2010), atoms and heat (pp. 38-66). To prepare for the test on this lesson, answer the questions below. Most of the answers can be found in the lectures, the rest from your textbook. Which has more mass and why an electrically-neutral helium atom, or a. How about the boundaries of individual atoms: to get some practice identifying ions, isotopes and molecules, try out this short online quiz: https://www. thoughtco. com/ions-and-isotopes-quiz-4090120. Some of the questions go a little beyond the scope of ou(cid:396) (cid:272)ou(cid:396)se, (cid:271)ut it(cid:859)s a g(cid:396)eat (cid:449)ay to test that you(cid:859)(cid:448)e (cid:373)aste(cid:396)ed the (cid:272)o(cid:374)(cid:272)epts. Note: a(cid:374) (cid:858)a(cid:374)io(cid:374)(cid:859) is a(cid:374)othe(cid:396) (cid:449)o(cid:396)d fo(cid:396) a (cid:374)egati(cid:448)ely-charged io(cid:374), a(cid:374)d a (cid:858)(cid:272)atio(cid:374)(cid:859) is a positi(cid:448)ely-charged ion. Also note: the notation 13 (cid:272)he(cid:373)i(cid:272)al ele(cid:373)e(cid:374)t (cid:894)c=ca(cid:396)(cid:271)o(cid:374)(cid:895), the ele(cid:373)e(cid:374)t(cid:859)s (cid:374)u(cid:373)(cid:271)e(cid:396) of p(cid:396)oto(cid:374)s (cid:894)6(cid:895), a(cid:374)d the total number of protons and neutrons in the nucleus (13). 6c refers to an isotope of carbon containing 6 protons and 7 neutrons, also known as carbon-13.
