What is the ratio by atoms of elements present in technetium (VII) peroxide? (peroxide is a polyatomic ion)
1:7
2:8
4:9
3:1

Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

What is the percent by mass of oxygen in fe2o3