In nitrogen atom seven protons are present. What will be atomic number of nitrogena) 7b) 14c) 8d) 16ii. Cu+ and Cu2+ will havea) Same number of protons and same number of electrons.b) Cu+ will have greater number of protons than in Cu2+c) Cu+ will have less number of protons than in Cu2+d) Cu2+ will have less number of electrons than Cu+iii. Which species of phosphorus is most stablea) Pb) P-1c) P-2d) P-3
Question
In nitrogen atom seven protons are present. What will be atomic number of nitrogena) 7b) 14c) 8d) 16ii. Cu+ and Cu2+ will havea) Same number of protons and same number of electrons.b) Cu+ will have greater number of protons than in Cu2+c) Cu+ will have less number of protons than in Cu2+d) Cu2+ will have less number of electrons than Cu+iii. Which species of phosphorus is most stablea) Pb) P-1c) P-2d) P-3
Solution
i. The atomic number of an element is determined by the number of protons in its nucleus. Since a nitrogen atom has 7 protons, its atomic number is 7. So, the answer is a) 7.
ii. The number of protons in an atom determines the element, and this number does not change with the charge. Therefore, both Cu+ and Cu2+ have the same number of protons. However, the charge indicates the number of electrons. A positive charge means that electrons have been lost. Cu+ has lost one electron, and Cu2+ has lost two electrons. Therefore, Cu2+ has fewer electrons than Cu+. So, the answer is d) Cu2+ will have less number of electrons than Cu+.
iii. The stability of an atom or ion is determined by its electron configuration. Atoms and ions are most stable when their outermost electron shell is full. For phosphorus (P), the most stable ion would be P-3 because it has gained three electrons to fill its outer shell. So, the answer is d) P-3.
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