Chemistry · S and p Block Elements
Work through this past-paper style MCQ, then read the full explanation. Practice more chemistry questions on mMCQ with adaptive drills and topic analytics.
Melting points of Group II-A elements are higher than those of Group I-A because:
- A
Atoms of II-A elements have smaller size
- B
II-A elements are more reactive
- C
Atoms of II-A elements provide two binding electrons
- D
I-A elements have smaller atomic radius
Metallic character as well as melting and boiling increase until period number three because the number of free electrons available for forming a metallic bond increases, so strong metallic bonds are formed As a result, melting Melting/Boiling boiling increases. Group-IIA offers two electrons for bonding while Group-IA offers one electron for bonding so it means IIA forms a stronger metallic bond.
From left to right in a period, the number of sizes decreases, but it is not a suitable reason for increase in boiling point because because mettalic character decreases from left to right and we have non-metal on the right-most side
reactivity is not a factor to be considered while talking about melting and boiling points.
Metallic character as well as melting and boiling increase until period number three because the number of free electrons available for forming a metallic bond increases, so strong metallic bonds are formed As a result, melting Melting/Boiling boiling increases. Group-IIA offers two electrons for bonding while Group-IA offers one electron for bonding so it means IIA forms a stronger metallic bond.
size of IA is greater than IIA
Tagged under Chemistry · S and p Block Elements · 2016