A.) a diver descends 12 feet below sea level. she then ascends 4 feet. state the depth of the diver in terms of sea level. explain how the depth was determined. b.) suppose the diver now descends an additional 12 feet. state the new depth of the diver in terms of sea level. explain how this depth was determined. c. ) explain how the diver will reach sea level from the position found in part b. 22 -22 8 -8 -20 20 -4 4 swim up 4 feet swim up 20 feet swim up 8 feet swim up 20 feet answer for part a: answer for part b: answer to part c:

1: The diver is 8 feet below sea level.

2: -20

3: -20 + 20 = 0

Step-by-step explanation:

1: This is determined by adding 4 to negative 12. -12 +4 = -8

2: You get this by subtracting 12 from negative 8. -8 - 12 = -20

3: This is done by adding 20 to negative 20. -20 + 20 = 0

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.