Periodic Trends Flashcards
1
Q
Atoms get ____ going across a period.
A
Atoms get SMALLER going across a period
2
Q
Atoms get _____ going down a group
A
Atoms get LARGER going down a group
3
Q
What to mention in an atomic radii question?
A
- Relevant Trend
- No. of energy levels/shielding effect
- Nuclear Charge
- Distance between nucleus and valence electrons.
4
Q
What is Ionisation energy?
A
The energy needed to remove ONE ELECTRON from each atom in ONE MOLE of atoms in the GASEOUS state.
5
Q
I.E generally ____ going across a period
A
I.E generally INCREASES going across a period
6
Q
I.E generally ____ going down a group
A
I.E generally DECREASES going down a group
7
Q
What is Electronegativity?
A
A measure of the attraction that atoms have for their bonding electrons.
8
Q
What is electronegativity affected by
A
- Nuclear Charge - stronger pull on electrons - increased net electrostatic attraction.
- No. of Energy Levels - more energy levels, decreased net electrostatic attraction - valence electrons experience less attraction to thenucleus of other atoms