S and P
Aluminum has it's valence electrons in the 3rd energy level. Others that also have valence electrons in n=3 would be Na, Mg, Si, P, S, and Cl. Argon also has a filled 3rd level.
The rows on the periodic table correspond to the highest energy level being filled by the elements in that row (period). For example, in period 3, the elements are filling their valence shell in the 3rd energy level from left to right across the period, from 3s1 in sodium to 3s23p6 in argon.
The 1st energy level can hold up to 2 electrons, the 2nd energy level can hold up to 8 electrons, and the 3rd energy level can hold up to 18 electrons.
The third energy level can hold a maximum of 18 electrons.
The atomic number (Z) is the number of protons in the nucleus, which also equals the number of electrons in a neutral atom. Therefore, an atom with an atomic number of 17 will have 17 electrons if it is electrically neutral.
The answer to this depends on the energy level under consideration.In general, the maximum number of electrons occupied in one energy level is given by 2n2 where n is the number of energy level. Thus 1st, 2nd, 3rd and 4th energy levels can occupy a maximum of 2, 8, 18 and 32 electrons
The lowest numbered energy level where a d sublevel is found is the third energy level. Energy levels are represented by numbers (1, 2, 3, etc.) and each level can contain sublevels corresponding to different types of orbitals (s, p, d, f).
Nobel gases are said to have completely filled third principle energy level. One example is Argon which is a noble gas.
The maximum number of electrons that can occupy the third energy level is 18. This level has 2 sublevels, s and p, which can hold a total of 18 electrons. The s sublevel can hold 2 electrons, and the p sublevel can hold 6 electrons, so the total is 2 + 6 + 10 = 18 electrons.
The 3rd energy level is the highest occupied energy level for chlorine with seven electrons.
In the 3rd energy level, there can be a maximum of 4 electrons.
Aluminum has it's valence electrons in the 3rd energy level. Others that also have valence electrons in n=3 would be Na, Mg, Si, P, S, and Cl. Argon also has a filled 3rd level.
Each atomic orbital is designated by the principal quantum number followed by the letter of the sublevel. -for more information see..."Modern Chemistry" text book Pg.108 3rd and 4th paragraph.
It goes 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p... it goes according to the principal quantum number, l. the subshells (or energy levels) have corresponding letters... 0th sublevel: s 1st sublevel: p 2nd sublevel: d 3rd sublevel: f 4th: g 5th: h 6th: i etc. usually, we dont use energy levels above the f subshell.
The 3rd energy level of an atom can hold a maximum of 18 electrons.
The third horizontal row in the periodic table corresponds to the 3rd energy level or shell. Each sublevel (s, p, d, f) within the 3rd energy level can hold a certain number of electrons: 3s can hold 2 electrons, 3p can hold 6 electrons, and 3d can hold 10 electrons. So, in total, the third horizontal row can hold 2 + 6 + 10 = 18 electrons.
1st energy has 1 sublevel -- 1 orbital -- 2 electrons 2nd energy level has 2 sublevels -- 4 orbitals -- 8 e- 3rd energy level has 3 sublevels -- 9 orbitals -- 18 e- 4th energy level has 4 sublevels -- 16 orbitals -- 32 e- Notice the pattern? number of orbitals = energy level squared Number of electrons = 2x number of orbitals