Someone please help me with 20 points and answer all my other questions (2 Questions) That's almost 35 points you can get. Please help. Thanks Suggest which elements have these atomic weights (Relative atomic masses)

A) 45 B) 68 C) 70 D) 180

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Label a-f based on the table using c for concentrated and d for dilute

Read "who built the pyramids? ”. leave this link open while you answer the questions throughout the assignment. give at least two reasons why some people claim the pyramids of giza were constructed by aliens.