___ is the number of shells for elements of the 3rd period.
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The tenth element in the Newland's periodic classification resembles the
The average expenditure per year during the period 2001-2006 is ___ (round off to the nearest integer).
Calculate the time period (in seconds) of a sound wave of wavelength 5m travelling with a speed of 500 m/s.
Orbital period of Halley's comet is ___ years.
Due to an acceleration of 1 m/s2 the velocity of a body increases from 15 m/s to 20 m/s in a certain period. Find the displacement (in m) of the body in that period.
Arrange the given words in the sequence in which they occur in the dictionary.
1. Perplex
2. Persistent
3. Periodic
4. Persist
5. People
Alkali metals are assigned which group in the Modern Periodic Table?
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