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