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Chemistry Chapter 5 The Periodic Law (pt 1 : History of the PTOE)questions n answers
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Chemistry Chapter 5 The Periodic Law (pt 1 : History of the PTOE)questions n answers
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Chemistry Chapter 5 The Periodic Law(pt 1 : History of the PTOE)
J.W. Dobereiner - correct answer ✔✔grouped elements into triads
Triads - correct answer ✔✔groups of 3 elements with similar properties
(ex. Cl, Br, I)
J.R. Newlands - correct answer ✔✔organized elements in Octaves
Octaves - correct answer ✔✔repeating group of 8 elements
Mendeleev - correct answer ✔✔Russian chemist who developed a periodic table of the chemical
elements and predicted the discovery of several new elements (1834-1907)
WROTE DOWN ELEMENTS OF INCREASING MASS
and found a pattern in repeating properties.
Mendeleev's periodic table - correct answer ✔✔grouped elements in columns by their similar properties
predicted undiscovered elements and properties before they were found.
Mosely's periodic table - correct answer ✔✔British physicist
Arranged elements according to INCREASING ATOMIC #
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