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Topic Overview
Atomic structure
Periodic trends
1: Atomic Radius
Questions
1: Discuss the difference between the radii of vanadium (171pm) and chromium (166pm)
2: Why the radius of a potassium atom is better than that of a sodium atom?
2: Ionisation energy
Key questions from the online article:
-What is ionisation energy?
-How do you write the equation for ionisation energy?
-Any exceptions from the general trend?
3: Electronegativity
1:What is electronegativity, and how does it affect the way atoms share electrons in a covalent bond?
2:Why do carbon and hydrogen form a nonpolar covalent bond in methane (CH₄)?
3:How does the difference in electronegativity between oxygen and hydrogen affect the bonding in a water molecule (H₂O)?
4:What is the main difference between a polar covalent bond and a nonpolar covalent bond?
5:In a water molecule, why does the oxygen atom have a slightly negative charge while the hydrogen atoms have a slightly positive charge?