Neon has 10 electrons.The element of next higher Z that has chemical properties very similar to those of neon has Z equal to:
A)11
B)17
C)18
D)19
E)36

Question

Quizplus · Accepted Answer

Neon is a noble gas with a completely filled valence shell of 8 electrons. The element with the next higher atomic number that also has a completely filled valence shell of 8 electrons is the noble gas, argon (Z=18). Therefore, choice C (18) is the best choice. Choices A (11), B (17), and D (19) all have incomplete valence shells and do not exhibit chemical properties similar to neon. Choice E (36) is krypton, which is also a noble gas with a completely filled valence shell, but it is not considered to have chemical properties very similar to those of neon.

Neon Has 10 Electrons