With the help of diagram answer the questions given below (the diagram shows the elements Li, Be, O and S):
a. Which atom should have smaller ionization enthalpy, oxygen or sulfur?
b. The lithium forms +1 ions while berylium forms +2 ions?

Question

Accepted Answer

**Step 1a. Locate O and S.** Both are group 16; O is period 2, S is period 3 — S sits directly below O in the same group.

**Step 2a. Apply the down-group IE trend.** Ionization enthalpy decreases down a group (section 7.5.2.3), so moving from O down to S, IE should decrease.

**Step 3a. Answer.** Sulfur (S) has the smaller first ionization enthalpy of the two (consistent with the chapter's own Problem 7.6, which places S's first IE near 1000 kJ mol⁻¹, below oxygen's 1314 kJ mol⁻¹ from Table 7.4).

**Step 1b. Consider Li's valence configuration.** Li is $2s^1$ — a single valence electron. Removing it leaves the stable, complete-duplet $1s^2$ [He] core — so Li readily forms $Li^+$. …

Q.With the help of diagram answer the questions given below (the diagram shows the elements Li, Be, O and S):
a. Which atom should have smaller ionization enthalpy, oxygen or sulfur?
b. The lithium forms +1 ions while berylium forms +2 ions?

Concept understanding — Ionization Enthalpy

Q.With the help of diagram answer the questions given below (the diagram shows the elements Li, Be, O and S): a. Which atom should have smaller ionization enthalpy, oxygen or sulfur? b. The lithium forms +1 ions while berylium forms +2 ions?

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Q.With the help of diagram answer the questions given below (the diagram shows the elements Li, Be, O and S):
a. Which atom should have smaller ionization enthalpy, oxygen or sulfur?
b. The lithium forms +1 ions while berylium forms +2 ions?

Unlock everything free for 14 days