What type of bonding around a central atom would result in a trigonal planar molecule?
A. Three groups bound to it with no lone pairs
B. One group bound to it with two lone pairs
C. Three groups bound to it with one lone pair
D. Four groups bound to it with no lone pairs

Explanation:

A. 3 groups bound to it with no lone pairs

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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6.4 cm (max) - 25 cm (min)