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