Question

The energy needed to remove one electron from a gaseous potassium atom is only about two thirds as much as that needed to remove one electron from a gaseous calcium atom, yet nearly three times as much energy as that

Answer 1

The length of two sides of the right angle triangle are equal.

Let the equal sides of the right angle triangle be x each (base and perpendicular) -------(i)

Given square of the hypotenuse is 800cm.

➡hypotenuse² e ^ 2 = 800 cm

By Pythagoras theorem, we get

➡ us * e ^ 2 = bas * e ^ 2 + perpendic * iota

800 cm = x ^ 2 + x ^ 2 (from equation (i) and (ii))

➡800cm = 2x²

x² = 800/2

= 400

➡x = √400

x = 20cm

Hence, the length of other sides is 20cm each.

VERIFICATION :

LHS :

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