What are the columns of periodic table called? March 23, 2021 / By Preparation Point / MODEL PAPER 65: EXCISE & TAXATION INSPECTOR (BS-16) (2018) Region Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedInA) Periods B) Verticals C) Perpendiculars D) Groups > Share this:TwitterFacebookMoreTelegramWhatsAppLike this:Like Loading... Related Share on WhatsApp Share on Facebook Share on Twitter Share on LinkedIn