34. How many total atoms are in Ca(NO3)2?

30. Oxygen most commonly forms:

1. Which sample is a compound?

17. An ion has 13 protons and 10 electrons. What is its charge?

13. Which particle has a +1 charge and is found in the nucleus?

26. Elements along the stair-step line are typically:

28. Elements in the same group generally have:

20. Which expression equals mass number?

33. How many oxygen atoms are in Al2(SO4)3?

8. A liquid has mass 18.5 g and density 0.925 g/mL. What is its volume?