Ron sells helium‐filled balloons in a park. He has a tank filled with 7.8E24 molecules of helium gas. If each balloon holds 1.6 liters, how many balloons can he fill? [Assume STP]

Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

There are main groups in the modern periodic table of elements