Try this option (see the attachment, the answers are marked by red colour), note, the value of the left angle in not visible (task no. 3) >> solution not given.
Answer:
the atoms can have different numbers of valence electrons
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Step-by-step explanation:
:D
62.1371
To obtain an approximate result, divide the speed value by 1.609
I think its the first option
I'm not sure
