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In which period and group is the element whose electron configuration is Kr5s1?
Group 1- as the configuration is ns1. The Kr in the question indicates the Krypton core. The 5s1 is the clue - the period number is the same as the principal quantum number (in this case 5) so the element is in group 1 and period 5 - so it is rubidium.
Is platinum an element or an compound?
It is an element.
What is metal element?
Metal is not an element. It is a term used to classify an element, but it is not an element.
A substance which cannot be seperated by ordinary chemical or physical method is an?
It is an element. Elements are composed of atoms, and atoms of elements combine chemically to form compounds.
Is sulfur element compound or mixture?
element. Sulfur dioxide (SO2) is a compound
Is there a element ef?
If you meant "element" as in a chemical element, there is no element with the symbol "ef" in the periodic table.
Is helium a good element or bad element?
There is no such thing as a good element or a bad element.
Is neon a compound or an element?
Neon is an element.
Is iron and an element?
Sand is NOT an element. Iron IS an element.
Is lithium a element a compound or a mixture?
Element
Is U an element or a compound?
Uranium is an element.
What is an examlple of an element?
Hydrogen is an element Lead is and element.
