The cup you'll design is to be used by campers on extended trips through the wilderness. To make sure the cup is affordable, it should be built using durable but inexpensive materials. The cooling mechanism in the cup will be the chemical reaction you analyzed in task 1. So the cup’s design should include two compartments: one for the liquid that’s being cooled and drunk and a second compartment for the water, baking soda, and citric acid that cool down the drinkable liquid. The volumes of these two compartments have been determined for you and are expressed in the table using four different units.

Volume
cubic centimeters
(cc) milliliters
(mL) fluid ounces
(fl oz) cups
(C)
chemical reaction compartment 150 150 5 0.6
drink compartment 600 600 20 2.5
total 750 750 25 3.1
Part A
What is the goal and purpose of the cup you’re designing?

i think it is d. e because the next one is igneous.

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.