Arrange the species in order of decreasing radii (Largest to smallest) 1. Kr
2.Se^-2
3.Zr^4+
4.Sr^2+

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring