Both Potassium and Fluorine only form one bond. Each potassium atom will donate there electron to 1 fluorine atom to form a bond. Therefore, you will need 30 Fluorine atoms.
3H + 3Br = HBr9 Organic chemistry mechanism
It is E. because the predators will have slightly more meals with their prey slightly increasing population.
A chemical substance that gains or accepts electrons from others is called lewis acids. The Lewis acid in the reaction is Trihydridoboron 
<h3>What are lewis acids and bases?</h3>
For the formation of the covalent bonds the molecule or the atoms that accept or gain an electron from the other species present in the reaction are called lewis acids. The species formed after accepting electrons are called a conjugate base.
The species that donates electrons to the other species are called lewis base and the species formed after the electron donation is called a conjugate acid.
Therefore, option B.
is the lewis acid as it gains an electron.
Learn more about lewis acids here:
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