How many valance electrons do atoms in group 1 group 2 and groups 15 to 17 have?
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Why do atoms of group 1 elements lose electrons to form cations where as atoms of group 17 elements gain electrons to form anions?
By doing so, both end up having a noble gas configuration, with 8 valence electrons (known as an octet). They do this to become chemically stable. They become stable as they h…ave filled their outer shell of electrons. Atoms of groups 1 elements have only 1 electron in their outer shells, which means to stabilize themselves it is easier for them to give this one atom away, rather than trying to gain 7 more. Once they have given the electron away there are more protons than electrons in the atom and so the atom become positively charged: a cation. The reverse of this applies for group 17 - it is easier for them to gain electrons, thus becoming negatively charged and an anion.
How do the outer-shell electron configurations for ions of elements from groups 1 and 2 and 15 and 16 and 17 compare with those of the noble gases?
Answer . Elements in Group 1 have 1 more electron than the noble gas in the row above it. Elements in Group 2 have 2 more electrons than the noble gas in the row above it…. Elements in Group 15 have 3 less electrons than the noble gas in the same row as it. Elements in Group 16 have 2 less electrons than the noble gas in the same row as it. Elements in Group 17 have 1 less electrons than the noble gas in the same row as it.
Answer . 23
Group One on the periodic table consists of. Li - Lithium . Na - Sodium . k - Potassium . Rb - Rubidium . Cs - Cesium . All of these elements all have plus one (+1) val…ence electrons which means they have one too many so they will give it up when bonding occurs.
48 are in the group 17
There are 2 valance electrons in group 2
elements of group 6 - colloum 10 gain 2 valence electrons when they form ionic bonds
Their valance electrons form an octet. Each compound wants to have 8 valence electrons (which forms an octet). Groups 1 and 2 have 1 and 2 valence electrons respectively. 1…6 and 17 have 6 and 7 respectively. So together, they form 8..
Why do atoms of group 1 elements lose electrons to form cations where as atoms of group 17 elements gain to form anions?
Because in each instance that is the lowest energy ion that the element can form. This is correlated with developing an electron shell structure like that of the noble gas wit…h the atomic number closest to the atomic number of the element. PORKE MAMEAN MUCHA VERGA HAHAHA PINNCHII CULEROS
Group 1 and 2 elements have 1 and 2 valence electrons respectively. Removal of these electrons will result in stable noble gas electronic configuration. Group 17 and 16 elemen…ts have 7 and 6 valence electrons respectively. Addition of 1 or 2 electrons to group 17 and 16 respectively will give them stable noble gas configuration. Hence these two groups are highly reactive and their elements will combine to form large number of compounds.
Group 1 has 1, group 2 has 2, group 15 has 5, group 16 has 6 and group 17 has 7 valence electrons.
Group 1 elements have 1 valence electron, group 2 has two valence electrons and group 15 has 5 valence electrons.
as it belongs to group 5 so valence electrons are 5. ex-> nitrogen
group 1...is 1 valence. group 2...is 2 valence.