Mendeleev arranged the table by atomic _____________ and Mosely arranged the table by atomic ____________

What breakthrough did Mendeleev make in devising a periodic table that was accepted by the scientific community?He arranged the elements in order of atomic weightHe left gaps in the table for unknown elementsHe devised the ‘law of octaves’He published the first full list of all the elements2Which of the following statements about the modern periodic table is not true?The number of shells decreases down a groupElements in the same group have the same number of electrons in the outer shellElements are arranged in atomic number orderElements in the same period have the same number of shells3Where are the non-metal elements found in the periodic table?On the rightAt the topAt the bottomOn the left4Which of the following elements, shown by its electronic structure, is found in group 2 of the periodic table?2, 8, 22, 72, 8, 12, 8, 45Why do fluorine, chlorine and iodine all have similar chemical properties?They are all metalsThey all have 7 electrons in their outer shellThey are all in the same periodThey all have odd numbers of electrons

How are the elements arranged in the current periodic table?A.In order of increasing average atomic massB.In order of increasing number of electronsC.In order of increasing number of neutronsD.In order of increasing atomic number

How are elements arranged on the periodic table?A.By increasing atomic radiiB.By increasing electronegativityC.By increasing atomic massD.By increasing atomic numberSUBMITarrow_backPREVIOUS

Describe how Mendeleev convinced the scientific community that his way of organising the elements into a periodic table was correct.

How are the elements arranged in the modern periodic table?A.According to atomic numberB.According to atomic massC.According to the number of neutronsD.According to the number of electrons