diff --git a/Grade 10/Science/SNC2DZ/Unit 1: Chemistry.md b/Grade 10/Science/SNC2DZ/Unit 1: Chemistry.md index 03ef4db..b08c763 100644 --- a/Grade 10/Science/SNC2DZ/Unit 1: Chemistry.md +++ b/Grade 10/Science/SNC2DZ/Unit 1: Chemistry.md @@ -33,22 +33,6 @@ ## Trends on the Periodic Table -## Rows -- Same energy level in each period -- Same number of valence electrons in each group -- Across a row/period $`\rightarrow`$ more $`p^+`$ in nucleus $`\rightarrow`$ greater attraction to $`e^-`$ -- Atomic radius decreases as you move acroos a row/period, due to more protons in the nucleus that attract the negatives. -- Atomic radius is the from the center of the atom (nucleus) to the outer most shell (valence shell) - -## Columns -- down a column, increase of energy level, as you move down -- every atom has only one valence shell (cause its the most outer shell) -- if valence shell is further away from the nucleus, less attractive force between nucleus and valence $`e^-`$ -- more energy levels where $`e-`$ can be -- Negative electrons are repeling the valence shell electrons `(shielding)` -- `Shielding` "inner electrons" repel valence electrons and "block" attraction force between valence electrons and nucleus -- Atomic radius increases as you move down a column/group -
Trend | @@ -81,6 +65,24 @@
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