Question
How many periods are there in the Modern Periodic
Table?Solution
The Modern Periodic Table consists of 7 horizontal rows known as periods. Each period corresponds to a new principal energy level which holds the elements placed according to their increasing atomic number.
More Chemistry Questions
Find the wrong number in the given number series.
1024, 256, 64, 32, 4, 1Find the wrong number in the given number series.
1215, 810, 540, 360, 240, 150
- Find the wrong number in the given number series.
-1, 48, 112, 193, 293, 416 9Â Â Â Â 20Â Â Â Â Â 63Â Â Â Â Â Â 255Â Â Â Â Â Â 1285Â Â Â Â Â 7716
...- Find the wrong number in the given number series.
10, 14, 23, 48, 99, 218 2.5, 15, 81, 325, 976, 1953
11, 20, 38, 65, 99, 146
A-5,  A,  35,  52, 78, 115
120, 139, 196, 291, 420, 595
3, 8, 28, 88, 258, 648Â
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