Worksheetslesson 1 quiz 1
Total questions: 10
Worksheet time: 12mins
the number of element in Mendeleev's periodic table is .................element.
92
118
76
67
the nucleus of atom contains...............
positive electrons
negative electrons
positive protons
negative protons
the scientist who left vacancies in his table to fill with suitable discovered element in future (a)
the scientist who discovered that the nucleus of atom contains positively charged proton (a)
the most important attempts to classify elements are ................................. ,.......................................&..........................
(a)
Mosely arranged element in ascending order according to their (a)
Mendeleev arranged element in ascending order according to their …
(a)
Give reason : many attempts are made by scientists to classify of elements
give reason :Mendeleev classify the elements of each main group into 2 sub groups
(write one point) advantage of Mendeleev periodic table and disadvantages of Mendeleev's periodic table
