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Chapter 4: Problem 23
Where are neutrons found in an atom? Are neutrons positively charged, negatively charged, or electrically uncharged?
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What is the difference between the atomic number and the mass number of an element? Can atoms of two different elements have the same atomic number? Could they have the same mass number? Why or why not?
Are most of the chemical elements found in nature in the elemental form or combined in compounds? Why?
For the following pairs of ions, use the concept that a chemical compound must have a net charge of zero to predict the simplest compound that the ions are most likely to form. a. \(\mathrm{Co}^{2+}\) and \(\mathrm{O}^{2-}\) b. \(C o^{3+}\) and \(S^{2-}\) c. \(A l^{3+}\) and \(C l^{-}\) d. \(\mathrm{Ba}^{2+}\) and \(\mathrm{N}^{3-}\) e. \(C a^{2+}\) and \(C^{4-}\) f. \(K^{+}\) and \(N^{3-}\)
An isolated atom has a net charge of__________.
On the basis of what property are the elements arranged in order on the periodic table? Why?
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