Trends
What is atomic radius?
The distance from the nucleus to the outermost shell of an electron in an atom
What is an ion?
n atom or molecule that has gained or lost one or more electrons, resulting in a net charge
Why is understanding atomic radius important?
It helps predict the physical and chemical properties of elements, including reactivity and bonding behavior.
Compare atomic radius of Na and Cl.
Sodium has a larger atomic radius than chlorine.
What trend does atomic radius follow in a group?
Atomic radius increases as you move down a group in the periodic table.
How does the size of a cation compare to its parent atom?
cation is smaller than its parent atom due to the loss of electrons and increased nuclear charge.
How does atomic radius impact chemical reactivity?
Larger atomic radii can lead to increased reactivity for metals, while smaller radii increase reactivity for nonmetals.
Which element has a larger radius: K or Ca?
Potassium (K) has a larger radius than calcium (Ca).
What trend does atomic radius follow across a period?
Atomic radius decreases as you move from left to right across a period.
How does the size of an anion compare to its parent atom?
An anion is larger than its parent atom due to the gain of electrons, which increases repulsion among electrons.
Describe the relationship between ionic radius and lattice energy.
Smaller ionic radii lead to higher lattice energy due to stronger electrostatic forces between ions.
Compare the ionic radius of Na⁺ and K⁺.
K⁺ has a larger ionic radius than Na⁺ due to its higher principal quantum number.