Plz help its for a test and I have 1 min left

An observation that requires measurement is called quantitative observable or qualitative

Which metal exist in liquid state and can be cut with knife ?

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive