Any formula / fundamentals to choose a right crane for right job
For the second question the answer is c) fluorine because the halogens all have thatAnd for number 3 nitrogen has 3 valence electrons and 1 lone pair.
1is B neonNeon is a noble gas in group 18This means it has 8 valence electrons in its outermost shellA lone pair is made up of 2 electrons so 8 electrons 4 lone pairs2is C fluorineThe same logic follows3 lone pairs is 6 electrons plus an additional bonding electron gives you 7 total electronsThis means you are looking for an element with 7 valence electrons, AKA an element in the 17 groupFluorine is the only element of the choices in group 173is ANitrogen is in group 15 and therefore has 5 valence electronsA and D are the only choices that have 5 electrons and you know the answer is not D because you will only ever have 0 or 1 bonding electronsIf there are at least 2 electrons then they will make a lone pair.
You are going to need at least a 100t to 130t craneThe 15m distance is the killer
