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Write a symbol for each of the following neutral isotopes. Include the atomic number and mass number for each.
(a) the alkali metal with 11 protons and a mass number of 23(b) the noble gas element with 75 neutrons in its nucleus and 54 electrons in the neutral atom(c) the isotope with 33 protons and 40 neutrons in its nucleus(d) the alkaline earth metal with 88 electrons and 138 neutrons
A. Therefore the symbol of the alkali metal is 23 $\mathrm{Na}$ .B. therefore the symbol of the noble gas is $\frac{129}{54} \mathrm{Xe}$ .C. Therefore the symbol of the isotope is $_{33}^{73} \mathrm{As}$ .D. Therefore the symbol of the alkaline earth metal is 226 $\mathrm{Ra}$ .
Chemistry 101
Chapter 2
Atoms, Molecules, and Ions
Atoms, Molecules and Ions
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however, this is Ricky, and they were working on Problem 43. So we're gonna be writing a symbol for the following neutralized. And there are fourth. And okay, so the alkali metal with 11 protons and ration under 23. So this is gonna be sodium, uh, next noble gas development are live 75 neutrons and 54 electrons in the neutral atom. That means to get the number of protons. You just add up the number of electrons with the neutrons because this is a, um, are sorry to get the mass. You add the number of electrons and protons because the number of electrons in this case are the same as the number of protons we get. A medicine 1 29 Comic number 54. This is seen on. All right, so I said help with 33 protons. 33 40 new trans 73. Can anyone take a guess? How if you guess it? And this is arsenic. All right. Last but not least, alkaline earth metal with 88 electrons and 138 neutrons. So 138 neutrons close 88 protons in the neutral atom. Yeah, this translates to 226 Mass number 88 Protons. Mrs. Radium Opus Videos. Helpful. I'll see you in the next one.
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