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Which elements in group 7 are solids at 20 degrees celsius?
iodine and Astatine
Why are halogens used in your daily life?
§ Halogens are a group of non metallic elements that are placed in Group 7 of the Periodic Table. There are 5 elements that are considered to be a part of this group, and that are widely known as halogens. § Halogens are used in our daily life as they are very useful and decrease the chances of being sick or getting disease.
What is meant by a subgroup generated by an element x belongs to group G?
It is a subset of the Group G which has all the properties of a Group, namely that it is a set of elements (numbers) with a binary operation (addition) that combines any two elements in the set to form a third element which is also in the set. The Group satisfies four axioms: closure, associativity, identity and invertibility. The set of integers, Z, is a Group, with addition as the binary operation. [It is also a Ring, but that is not important here]. The set of all multiples of 7 is a subgroup of Z. Denote the subgroup by Z7. It is a Group because: Closure: If x and y are in Z7, then x = 7*p for some p in Z and y = 7*q for some q in Z. Then x + y = 7*p + 7*q = 7*(p+q) where p+q is in Z because Z is a Group. Therefore 7*(p+q) is in Z7. Associativity: If x (= 7p), y (= 7q) and z (= 7r) are in 7Z, then (x + y) + z = (7p + 7q) + 7r since these are in Z an Z is associative, = 7p + (7q + 7r) = x + (y + z). Identity: The additive identity is 0, since 0 + x = 0 + 7p = 7p since 0 is the additive identity in Z. Invertibility: If x = 7a is in Z7 then 7*(-a) is also in 7Z. If 7*(-a) is denoted by -x, then x + (-x) = 7a + 7*(-a) = 0 and so -x is the additive inverse of x. But there are elements of Z, for example, 2 which are not in Z7 so Z7 it is a proper subset of Z.
2 over 7 in simplest form?
2/7 is in its simplest form.
What is the simplest form of 15 over 7?
15/7 is in its simplest form.
Can Group 6 and Group 7 elements only form covalent bonds?
yes.
What are the uses of group 1 and 7 elements?
They combine to form salts.
Why are the elements of group 1 and 7 are mostly used in the form of compounds?
no one ahs heard about it
What is the name given to the elements in group 7?
The name given to group 7 elements in the Periodic Table are halogens.
Why are group1 and 7 found as compounds?
Group 1 elements have very low electronegativies and group 7 elements have very high electronegativities, so that both are reactive with almost every other element, the group 1 elements by donating electrons and the group 7 elements by accepting electrons.
How many valence electrons do elements group 17 have?
There are 7 valence electrons in elements of group-17. They are called halogens.
What do all elements in group 7 have in common?
All elements in group 7 have the same no. of electrons in their outermost shells... and this no. correspondes to the group no.
What is the collective name given to the elements in group vii?
Group 7 elements are known as "halogens".
What group does group one from the periodic table likes to reacts with?
Group one elements are the most reactive with group 7 elements as it is the easiest way for the elements to complete their outer shell as the group one element gives its extra electron to the group 7 element and then the group 7 element has a full shell too.
Which group of elements has the highest electron affinity?
Groups 6 and 7.
Why are group 7 and group 1 elements usually found as compounds?
These elements are highly unstable because of for group1- IP is low and for group 7 electron affinity is high
How many elements make up group 7 group 14 and group 18?
There is a total of 17 elements in those groups.
