A construction worker is placing rivets in a new bridge. He uses 42 rivets to build the first 2 feet of the
bridge. If the bridge is to be 2200 feet in length, predict the number of rivets that will be needed for the entire bridge.

about 105 rivets to build 2200 ft of the bridge .

Step-by-step explanation:

first i found out how many rivets it took to build one ft of the bridge .

i divided 42 by 2 to get how many rivets it took to build one ft. i got (21)

21 rivets for 1 ft

next i divided 2200 ft by 21 rivets (2200÷21)= 104.76

104.76 rounded is 105

x=half

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.