The picture below shows the position of earth and two stars.

star 2 is 52 light years from earth and 18 light years from star 1. if star 1 explodes as a supernova, in how many years would the explosion be seen from earth?

18

34

52

70

34

Step-by-step explanation:

Given that:

distance from Earth to Star 2 = distance from Earth to Star 1 + distance from Star 1 to Star 2

distance from Earth to Star 1 = distance from Earth to Star 2 - distance from Star 1 to Star 2

distance from Earth to Star 1 = 52 - 18 = 34 light years

answer: options

step-by-step explanation:

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.