Physics Learning

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1. 1. (a) Find to three significant digits the charge and the mass of an ionized hydrogen atom, represented as H+. Suggestion: Begin by looking up the mass of a neutral atom on the periodic table of the elements. (b) Find the charge and the mass of Na+, a singly ionized sodium atom. (c) Find the charge and the average mass of a chloride ion Cl-  that joins with the Na+ to make one molecule of table salt. (d) Find the charge and the mass of Ca++ =Ca2+, a doubly ionized calcium atom. (e) You can model the center of an ammonia molecule as an N3- ion. Find its charge and mass. (f) The plasma in a hot star contains quadruply ionized nitrogen atoms, N4+. Find their charge and mass. (g) Find the charge and the mass of the nucleus of a nitrogen atom. (h) Find the charge and the mass of the molecular ion H2O-.

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