Which of the following symbols would be included in the noble gas notation for an element that had valence electrons in the 5s subshell?
A) Ar
B) Kr
C) Хе
D) Rn

Would be appreciated if I could get a quick answer. Thank you in advance.

This graph gives information on changes in sea ice extent in the arctic ocean over a 30-year span. the overall trend shows in the ice extent. to address the trend, scientists need to ask themselves, one direct consequence of the trend is that

Which statement is best described as a atom

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral