To answer this question, we need to know the atomic number of each species, which represents the number of protons and, in a neutral atom, also the number of electrons.

I. S2–: Sulfur (S) has an atomic number of 16, so a neutral S atom would have 16 electrons. However, S2– indicates that this ion has gained 2 extra electrons, so it has 18 electrons.

II. Cl–: Chlorine (Cl) has an atomic number of 17, so a neutral Cl atom would have 17 electrons. However, Cl– indicates that this ion has gained 1 extra electron, so it has 18 electrons.

III. Ne: Neon (Ne) has an atomic number of 10, so a neutral Ne atom would have 10 electrons.

Therefore, S2– and Cl– have the same number of electrons (18), but Ne does not. So, the correct answer is A. I and II only.

Question

To answer this question, we need to know the atomic number of each species, which represents the number of protons and, in a neutral atom, also the number of electrons.

I. S2–: Sulfur (S) has an atomic number of 16, so a neutral S atom would have 16 electrons. However, S2– indicates that this ion has gained 2 extra electrons, so it has 18 electrons.

II. Cl–: Chlorine (Cl) has an atomic number of 17, so a neutral Cl atom would have 17 electrons. However, Cl– indicates that this ion has gained 1 extra electron, so it has 18 electrons.

III. Ne: Neon (Ne) has an atomic number of 10, so a neutral Ne atom would have 10 electrons.

Therefore, S2– and Cl– have the same number of electrons (18), but Ne does not. So, the correct answer is A. I and II only.

Knowee AI · Accepted Answer

To answer this question, we need to know the atomic number of each species, which represents the number of protons and, in a neutral atom, also the number of electrons.

I. S2–: Sulfur (S) has an atomic number of 16, so a neutral S atom would have 16 electrons. However, S2– indicates that this ion has gained 2 extra electrons, so it has 18 electrons.

II. Cl–: Chlorine (Cl) has an atomic number of 17, so a neutral Cl atom would have 17 electrons. However, Cl– indicates that this ion has gained 1 extra electron, so it has 18 electrons.

III. Ne: Neon (Ne) has an atomic number of 10, so a neutral Ne atom would have 10 electrons.

Therefore, S2– and Cl– have the same number of electrons (18), but Ne does not. So, the correct answer is A. I and II only.

Which species have the same number of electrons?I. S2–II. Cl–III. NeA.I and II onlyB. I and III onlyC. II and III onlyD. I, II and III

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