Multiple ChoiceWhich of the following is the atomic number of fluorine (symbol F) on the periodic table?87views
Multiple ChoiceWhich of the following is the symbol for the element located in group 4A (14) and period 2 of the periodic table?76views
Multiple ChoiceWhich of the following lists contains only correct chemical symbols for three different elements?86views
Multiple ChoiceWhich of the following is the correct chemical symbol for the element with 32 protons?62views
Multiple ChoiceWhich of the following is the correct chemical symbol for the element with atomic number 12 among the first 20 elements of the periodic table?79views
Multiple ChoiceWhich of the following is the atomic number of mercury (Hg) on the periodic table?98views
Multiple ChoiceWhich one of the following elements was not easily spotted by ancient cultures?91views