23. true or false? atoms that have the same number
of neutrons but different numbers of protons are
called isotopos.

True

Explanation:

Because Atoms are basically the same thing

molecular shape of is trigonal planar.

Explanation: Formula used

where, V = number of valence electrons present in central atom i.e. boron = 3

N = number of monovalent atoms bonded to central atom=3

C = charge of cation = 0

A = charge of anion = 0

The number of electrons is 3 that means the hybridization will be and the electronic geometry of the molecule will be trigonal planar.