1). How can the position of a particle be determined?

A-by measuring its mass

B-by determining its charge

C-by analyzing its interactions with another particle

D-by measuring its velocity


2). What is the mass number for an oxygen atom that has 10 neutrons in its nucleus?

A-16

B-8

C-18

D-10


3). What determines different shapes of an orbital?

A-speed

B-velocity

C-energy sub-level

D-all of the above