How many atoms of gold are present in a 250 kg sample of sylvanite? Group of answer choices

7.18 X 10^25 Au atoms

6.02 X 10^23 Au atoms

5.18 X 10^25 Au atoms

4.49 X 10^26 Au atoms

Me i dont know what to do! 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.

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?