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The charge of group 7A elements when forming ions is -1 (negative 1).
They can form ionic compounds with halogens.
I'm guessing noble gases since they do not react with other elements
The noble or inert gases.
none of the elements in the periodic table have a charge unless they gain (- charge) or lose (+ charge) an electron, or they can get delta charges which depends on what they are bonded too, that is what i learned in A2 chem a few monthes agoThe above information is absolutely correct... but here is a bit more information specifically for group 1A elements. All elements in group 1A can have a +1 charge as ions. Group 1A elements, such as sodium (Na), have 1 valence electron in their outer shell. When forming ionic compounds, sodium ions tend to donate this one electron to an element (in ionic form) that has 7 electrons in its outer shell. Thus, satisfying each atoms octet rule (haveing 8 electrons in their outer shell), as well as forming a neutral ionic compound.
The charge of group 7A elements when forming ions is -1 (negative 1).
They can form ionic compounds with halogens.
I'm guessing noble gases since they do not react with other elements
The most common charge (or valency) is -2. But there are compounds formed by elements of group VIA with valency from -2 to +6
The noble or inert gases.
I think what you are asking is about is which group on the periodic table has elements with an oxidation number of -1 in most ionic compounds. That is the 17th group - the halogens.
group 17
none of the elements in the periodic table have a charge unless they gain (- charge) or lose (+ charge) an electron, or they can get delta charges which depends on what they are bonded too, that is what i learned in A2 chem a few monthes agoThe above information is absolutely correct... but here is a bit more information specifically for group 1A elements. All elements in group 1A can have a +1 charge as ions. Group 1A elements, such as sodium (Na), have 1 valence electron in their outer shell. When forming ionic compounds, sodium ions tend to donate this one electron to an element (in ionic form) that has 7 electrons in its outer shell. Thus, satisfying each atoms octet rule (haveing 8 electrons in their outer shell), as well as forming a neutral ionic compound.
group 1 elements.
The transition metals tend to form colored compounds.
all of the elements in the third group
On the left of the periodic table, especially group 1 and group 2 elements.