3.1 Electronegativity and bonding

4 of 4 objectives have lessons · 0 studied · 0 secure

Lessons

Electronegativity: the tug-of-war for electronsWhat electronegativity means, and how nuclear charge, atomic radius and shielding decide how hard an atom pulls on bonding electrons. 4 min, not started
Electronegativity trends across and downElectronegativity increases across a period and decreases down a group. Here's why, in the words examiners reward. 4 min, not started
Ionic or covalent? Ask the electronegativity differenceUse the difference between two Pauling electronegativity values to predict whether a bond is ionic or covalent, and which bond is the most ionic. 5 min, not started

Syllabus objectives

4 objectives

What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.

3.1.1

Define electronegativity as the power of an atom to attract electrons to itself.

Taught in: Electronegativity: the tug-of-war for electrons · 2 questions

3.1.2

Explain the factors influencing the electronegativities of the elements in terms of nuclear charge, atomic radius and shielding by inner shells and sub-shells.

Taught in: Electronegativity trends across and down, Electronegativity: the tug-of-war for electrons · 7 questions

3.1.3

State and explain the trends in electronegativity across a period and down a group of the Periodic Table.

Taught in: Electronegativity trends across and down · 6 questions

3.1.4

Use differences in Pauling electronegativity values to predict whether ionic or covalent bonds are formed.

The presence of covalent character in some ionic compounds will not be assessed. Pauling electronegativity values will be given where necessary.

Taught in: Ionic or covalent? Ask the electronegativity difference · 6 questions