Chemistry C3 1.1 0.0 / 5 ? ChemistryThe Periodic TableGCSEAQA Created by: Atlanta and JacobCreated on: 22-02-16 17:59 How did the periodic table of the elements develop? It developed as chemists tried to classify the elements. 1 of 16 How does the periodic table arrange the elements? It arranges them in a pattern in which similar elements are grouped together. 2 of 16 How did Newlands' table arrange the elements? In order of atomic weight. 3 of 16 What did Newlands' table fail to do? Take into account elements that were unknown at the time. 4 of 16 How did Mendeleev's periodic table provide the basis for the modern periodic table? It left gaps for the unknown elements. 5 of 16 During the 19th century, many elements had been discovered but what did scientists not know about? The structure of atoms. 6 of 16 In the 19th century scientist tried to find ways to classify elements based on what? Atomic weight and properties. 7 of 16 Why did scientists in the 19th century use atomic weights rather than proton numbers to classify the elements? Because they did not know about the structure of atoms. 8 of 16 What did Newlands propose in 1863? His law of octaves. 9 of 16 What did Newlands' law of octaves state? That similar properties are repeated every eighth element. 10 of 16 How did Newlands' arrange his table? He put the 62 elements known at that time into seven groups according to their atomic weights. 11 of 16 Why didn't other scientists accept Newlands' ideas? After calcium the properties of the elements did not match very well within the groups of Newlands' table. 12 of 16 When did Newlands propose his law of octaves? 1863. 13 of 16 When did Mendeleev produce a better table than Newlands? 1869. 14 of 16 What was better about Mendeleev's table in comparison to Newlands'? He left gaps for undiscovered elements so that the groups of known elements did have similar properties. 15 of 16 What did Mendeleev predict? Mendeleev predicted the properties of the missing elements, when some of the elements were discovered Mendeleev's predictions were confirmed. 16 of 16
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