Home › KCSE › Chemistry › Chemical Bonding and Molecular Geometry › How does electronegativity change across a perio…
How does electronegativity change across a period and down a group?
ARises across a period, falls down a group
BFalls across a period, rises down a group
CRises across a period, rises down a group
DFalls across a period, falls down a group
Answer & Solution
Correct answer: A. Rises across a period, falls down a group
1. Moving left to right across a period, electronegativity increases.
2. Moving down a group, electronegativity decreases.
3. Putting the two trends together drives the highest values into the upper right of the table.
4. That is why the nonmetals there are the most electronegative and the group 1 metals the least.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 7 "Chemical Bonding and Molecular Geometry", section Electronegativity_
Related questions
An ionic formula such as Al2O3 does not tell you:For p-block elements forming cations, electrons are removed from which orbitals first?In a chlorine molecule, each chlorine atom ends up surrounded by how many electrons in totA monatomic anion typically forms when a nonmetal atom gains enough electrons to reach:The calcium ion Ca2+ is isoelectronic with which noble gas?When transition metals ionise, the electrons removed first come from the:Breaking the bonds in one mole of hydrogen molecules requires about:Most covalent compounds are poor conductors of electricity because they are: