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WorksheetsLesson 2 - True or False
Total questions: 10
Worksheet time: 5mins
Electrons and protons were not discovered before the nineteenth century.
True
False
Atomic masses of many elements were measured accurately in the 19th century.
True
False
John Newlands was the first one to arrange elements in order of atomic mass.
True
False
John Newlands was the first one to discover the law of octaves.
True
False
The periodic table of Mendeleev could predict the properties of elements that had not yet been discovered.
True
False
Mendeleev worked with Meyer to build their version of the periodic table, which was a great improvement over Newlands's one.
True
False
According to the periodic table proposed by Mendeleev, argon should be placed in the same group with lithium and sodium.
True
False
Rutherford was the first person to find out that the nuclei of elements are positively charged.
True
False
According to Moseley, the order of increasing atomic numbers is always the same as the order of increasing atomic masses.
True
False
Physical and chemical properties could be explained based on the electron configurations of elements.
True
False
