The electron configuration 1s 2s 2p 3s 3p represent which noble gas

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon

What is a number added in front of a formula in order to balance the equation

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