Which force was the first to be discovered?

A. Gravity
B. Weak nuclear force
C. Strong nuclear force
D. Electromagnetic force

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

Jessica is traveling from miami, florida, to chicago, illinois. using the map, tell one way the land will change during the second half of her trip.

Nan element’s square on the periodic table, the number with the greatest numerical value represents the