Question
Arrange the following in order of increasing mass.(a) a sodium ion(b) a selenium atom(c) a sulfur $\left(\mathrm{S}_8\right)$ molecule(d) a scandium atom
Step 1
The atomic mass is typically given in atomic mass units (amu). Step 2: Find the mass of a sodium ion (Naāŗ). The atomic mass of sodium (Na) is approximately 23 amu. Since the mass of an ion is essentially the same as its atomic mass, the mass of a sodium ion is Show more…
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Arrange each of the following sets of atoms and ions, in order of increasing size: $(\mathbf{a}) \mathrm{Se}^{2-}, \mathrm{Te}^{2-}, \mathrm{Se} ;(\mathbf{b}) \mathrm{Co}^{3+}, \mathrm{Fe}^{2+}, \mathrm{Fe}^{3+};$ $(\mathbf{c}) \mathrm{Ca}, \mathrm{Ti}^{4+}, \mathrm{Sc}^{3+} ;(\mathbf{d}) \mathrm{Be}^{2+}, \mathrm{Na}^{+}, \mathrm{Ne}.$
For each of the following sets of atoms and ions, arrange the members in order of increasing size: (a) $\mathrm{Se}^{2-}, \mathrm{Te}^{2-}, \mathrm{Se}$ (b) $\mathrm{Co}^{3+}, \mathrm{Fe}^{2+}, \mathrm{Fe}^{3+}$ (d) $\mathrm{Be}^{2+}, \mathrm{Na}^{+}, \mathrm{Ne}$. (c) $\mathrm{Ca}, \mathrm{Ti}^{4+}, \mathrm{Sc}^{3+}$
Arrange each of the following sets of atoms and ions, inorder of increasing size: (a) Se2-, Te2-, Se; (b) Co3+, Fe2+, Fe3+;(c) Ca, Ti4+, Sc3+; (d) Be2+, Na+, Ne.
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