Biology, asked by kujurkunti40, 6 months ago

d) Species which do not exist
do not exist on the earth
now.​

Answers

Answered by sheenacatherine5
0

dinosaurus, dodo bird , Phoenix bird etc...

Answered by skj8864061002
0

Explanation:

Be

2

does not exist under normal condition. Beryllium has four electrons , so electronic configuration of Be

2

having 8 electrons will be σ1s

2

σ

1s

2

σ2s

2

σ

2s

2

and the bond order is

2

N

a

−N

b

=0

Since Be

2

is having bond order 0 , no bond is formed between the two atoms. Hence Be

2

is unstable

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