Periodic Classification Of Elements - Study Mode
[#86] In the modern periodic table, period . . . . . . . . and . . . . . . . . does not contain any metalloids.
Correct Answer
(B) 1, 7
[#87] How many elements were known when Mendeleev began his work?
Correct Answer
(D) 63
[#88] The element with the highest first ionization potential is . . . . . . . .
Correct Answer
(C) nitrogen
[#89] What do Lithium, Sodium and Potassium have in common?
Correct Answer
(C) They have one electron in their outermost shell
[#90] Which of the following elements was the last element in Newland's law of octaves?
Correct Answer
(C) thorium