Why did people not agree with mendeleev?

Do reptilia have a vertebral column? Suppose an object weighs 15 g and has a volume of 5 cm what is the density of the object? What was the name of the country that had an earthquake in 1920? How is the periodic table organized according to mendelev and moseley? What gauge wire is needed for 240 volts? What space process can lead to the formation larger elements? How might your body be affected if a certain gland made releasing hormone that stimulates the thyroid? How did the rainier cherry get its name? What does rises mean on an ordnance survey map? Why is the genotype heterozygous also known as a hybrid or carrier? Can degreasers cause rust? Which chamber discharges its contents through the aortic valve? Why is silver nitrate added to plant tissue culture medium after autoclave? How can you prepare sleeping gas in your lab? What is the time difference between the UK and Algeria? What causes an atom to have a negative charge? What is the meaning of insulation in geography? What day is international flower day? What is a trial to a solution called? What are non examples of fossils?