Groups & Periods Flashcards
number of valence electrons of an element in Group 15
5
number of electron shells of an element in Period 4
4
electrons found in the outermost shell of an atom
valence electrons
number of valence electrons of an element in Group 14
4
use a periodic table; name the first and last elements in Group 18
helium, oganesson
Group # with elements having 6 valence electrons
16
number of electron shells of an element in Period 2
2
reason helium is in Group 18
full valence shell
number of valence shells of an element in Period 4
1
use a periodic table; name the first and last elements in Period 5
rubidium, xenon
Group # with elements having 3 valence electrons
13
use a periodic table; name the first and last elements in Period 2
lithium, neon
number of electron shells of an element in Period 1
1
Group # including the element helium
18
number of electron shells of an element in Period 6
6
number of valence electrons of an element in Group 1
1
number of valence shells of an element in Period 1
1
number of electron shells of an element in Period 3
3
Group # with elements having 8 valence electrons
18
number of valence electrons held by shell #1
2
use a periodic table; name the first and last elements in Group 17
fluorine, tennessine
Group # with elements having 1 valence electron
1
use a periodic table; name the first and last elements in Period 3
sodium,
number of valence shells of an element in Period 6
1
use a periodic table; name the first and last elements in Group 14
carbon, flerovium
number of valence electrons of an element in Group 18
8
Group # with elements having 4 valence electrons
14
number of valence electrons held by shell #2
8
number of valence electrons of an element in Group 2
2
number of valence electrons held by shell #4
8
number of electron shells of an element in Period 7
7
use a periodic table; name the first and last elements in Period 4
potassium, krypton
number of valence shells of an element in Period 7
1
how is helium similar to the elements in Group 18
all have a full valence shell
use a periodic table; name the first and last elements in Group 13
boron, nihonium
use a periodic table; name the first and last elements in Period 1
hydrogen, helium
number of valence electrons of an element in Group 17
7
use a periodic table; name the first and last elements in Period 6
caesium, radon
use a periodic table; name the first and last elements in Period 7
francium, oganesson
use a periodic table; name the first and last elements in Group 15
nitrogen, moscovium
number of valence shells of an element in Period 2
1
use a periodic table; name the first and last elements in Group 2
beryllium, radium
number of valence electrons held by shell #5
8
Group # with elements having 2 valence electrons (exception is helium)
2
number of valence shells of an element in Period 3
1
use a periodic table; name the first and last elements in Group 1
hydrogen, francium
number of valence shells of an element in Period 5
1
number of valence electrons held by shell #3
8
Group # with elements having 5 valence electrons
15
number of electron shells of an element in Period 5
5
number of valence electrons held by shell #6
8
use a periodic table; name the first and last elements in Group 16
oxygen, livermorium
Group # with elements having 7 valence electrons
17
the outermost shell of an atom
valence shell
number of valence electrons held by shell #7
8
number of valence electrons of an element in Group 13
3
number of valence electrons of an element in Group 16
6
