Unit 5 - Chemical Periodicity

5.0(1)
studied byStudied by 5 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/19

flashcard set

Earn XP

Description and Tags

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

20 Terms

1
New cards
Trends in Atomic Size - Group Trends
Atoms get bigger as they go down a family because they are adding energy levels.
2
New cards
Trends in Atomic Size - Periodic Trend
Atoms ten to get smaller as you go across the period from left to right because you are adding electron in same energy level and the nuclear charge is increasing. This causes valence electrons to come closer to atom.
3
New cards
Atomic Radius
Half the distance between two nuclei of same element
4
New cards
Nuclear Shielding
Electrons stays the same
5
New cards
Nuclear Pull
Protons increases
6
New cards
Trends in Ionic Size - Group Trend
Get larger as you do down family. More energy levels
7
New cards
Trends in Ionic Size - Periodic Trends
Cations and Anions
8
New cards
Cations
Smaller than the atoms because they lose electrons and get smaller as you lose
9
New cards
Anions
Larger than the atoms because they gain electrons and they get smaller as they gain fewer electrons.
10
New cards
Trends in Ionization Energy - Group Trend
Decreases as you go down family, getting bigger
11
New cards
Trends in Ionization Energy
The energy needed to remove an electron from an element in gaseous state

X(g) -> X+(g) + e-
12
New cards
Trends in Ionization Energy - Periodic Trend
Increases along the period because atoms are getting smaller and the valence electrons are closer/held more tightly by the nucleus.

More than one energy level can be removed

Ionization energy increases, removing electrons from a positive ion after first electron is removed.
13
New cards
Labeling of Ionization Energy
Number of electron being removed, 1st, 2nd, 3rd ionization energy
14
New cards
Trends in Electronegativity
Attraction for a pair of electrons by a shared bong
Composite Number
Linus Pauling
F has the highest and Cs has lowest
15
New cards
Trends in Electronegativity - Group Trend
Decrease down a family
16
New cards
Trends in Electronegativity - Periodic Trend
Increase as atoms get smaller across period
17
New cards
Electron Affinity
The energy change associated with the gaining of an electron.
18
New cards
Melting Point
The changing of a solid to a liquid, particularly of metals.
19
New cards
Melting Point - Group Trend
Decreased down a family as they get larger
20
New cards
Melting Point - Period Trend
Increases across the metallic period as there are more valence electrons to hold metal together. Takes more energy.