How many valance electrons do atoms in group 1 group 2 and groups 15 to 17 have?
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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.
48 are in the group 17
There are 2 valance electrons in group 2
The elements in Group 1 have one valence electron in their outermost s orbital.
Noble Gas Configuration.
Group #15 has 5 valence electrons
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
The ionic charges of group 1 and 2 metals are +1 and +2respectively. Group 15 & 16 the simple mono-atomic ions are -3and -2. Group 17 ions are -1. This can be explained by the…following elemnts in groups 1 and 2 lose 1 or 2electrons respectively to achieve a noble gas configuration whereasgroups 15, 16 and 17 gain electrons (3,2 1respectively)
Two of the halogens (group 17) and one of the earth alklides (group 2) Example: 2 Cl - + Ca 2+ --> CaCl 2