12. if each orbital can hold a maximum of two electrons, how many electrons can each of the following hold?
a.
b. 2s c. 5p d. 4f e. 3d f. 4d
for the following electron configurations choose 3 possible elements (or ions) they may represent
1. 1s2 2s22p6 3s23p6 4s2 3d10 4p4
2. 1s2 2s22p6 3s23p6 4s2 3d10 4p5
3. 1s2 2s22p6 3s23p6 4s2 3d10 4p6
4. 1s2 2s22p6 3s23p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s1
5. 1s2 2s22p6 3s23p6 4s2 3d10 4p6 5s24 d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d8

This element exists in adundance in the sun. explain how you would go about capturing sunlight. would this captured sunlight contain any of the element?

Agas is contained in a thick walled balloon when the pressure changes from 1.21 atm to 2.52 the volume changes from 3.75 l to 1.72 l and the temperature change from 293k to blank k

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.