Question 421993ChemistryWAEC

Which of the following species is/are electrically neutral? (ProtonsNeutronElectronI.P91010II.Q171818III.R172017IV.S121212)\begin{pmatrix} & Protons & Neutron & Electron\\ I.P & 9 & 10 & 10\\ II.Q & 17 & 18 & 18\\ III.R & 17 & 20 & 17\\ IV.S & 12 & 12 & 12\end{pmatrix}

A

IV Only

B

I and II

C

III and IV

D

I, II, III and IV

Step-by-Step Explanation

An electrically neutral species has an equal number of protons and electrons, resulting in no net charge. Species III (R) has 17 protons and 17 electrons, while species IV (S) has 12 protons and 12 electrons, making both electrically neutral. Species I (P) and II (Q) have more electrons than protons, resulting in a negative charge.

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