What are the vertical columns on a periodic table called

Select the correct answer. which statement is true about a polarized object? o a. it gains electrons and becomes negatively charged. ob. it gains protons and becomes positively charged. oc. the number of positive and negative charges can be the same. od. it has to be a metal. o e. there is no change in the distribution of the charge in the object. reset next what

__can be defined as which velocity changes

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa