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Chemistry Test #2

Terms in this set (12)

Atomic Mass Trends
across-increases
down-increases
It increases because the # of protons/neutrons increase
Atomic Radius Trends
across-decreases
down-increases
You add energy levels as you move down, and add protons as you move across
Electron Affinity Trends
across-increases until it reaches noble gases
down-decreases
The closer the element is to stability, the more they want an electron (higher affinity)
What is electron affinity?
The energy change that occurs when an atom games and electron and releases energy in the process
Electronegativity Trends
across-increases
down-decreases
you gain more protons as you move across and you gain more energy levels as you move down
First Ionization Energy Trends
across-increases
down-decreases
as you go down the periodic table the number of protons grows
What is first ionization energy?
Energy required to remove the most loosely held electron or how easy it is for electron to be pulled
Groups
up and down
Periods
horizontal
Coulomb's Law
The further way electrons and protons are the less they are attracted, the more protons there are the more attraction
Why do elements in the same group have similar chemical properties?
because they have the same number of valence electrons
Groups on the periodic table
Sets with similar terms