Symbol group period YAA GURLYY

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Last updated 12:17 PM on 5/23/26
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4 Terms

1
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period

horizontal row = period

tells u number of electron shell present

All elements in period have same number of shells, but diff numbers of electrons that fill those shells

eg:

•Determine the number of electron shells found in the following elements:

•Carbon

•Carbon is found in period 2, and so has 2 electron shells

2
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Groups

  • vertical column

  • •The group number tells you the number of valence electrons in the element.

•Hydrogen (Group 1) has 1 VE, carbon (group 14) has 4 VE, phosphorus (group 15) has 5 valence electrons, and so on.

<ul><li><p>vertical column </p></li><li><p><span>•The group number tells you the <strong>number of valence electrons in the element.</strong></span></p></li></ul><p></p><p><span>•Hydrogen (Group 1) has 1 VE, carbon (group 14) has 4 VE, phosphorus (group 15) has 5 valence electrons, and so on.</span></p><p></p><p></p>
3
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groups

all element in group = same # of VE

As you move down a group, the elements get more reactive,

4
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FU

fu