A family owns a vacation cabin located on a hillside below a gas station with an underground leaking gasoline storage tank. In which situation is the drinking water for the cabin most likely to be contaminated?

It will most likely be contaminated when the gasoline from the leaking storage tank seeps into the water source of the cabin.

Explanation:

A vacation cabin located on a hillside below a gas station with an underground leaking gasoline storage tank is somewhat not a good idea due to the risk of leakage being involved.

When there is a leakage in the underground gasoline storage tank, it seeps from the rock particles into the surrounding waterbodies which poses health hazards for the inhabitants.

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.