Respuesta :
Answer:
B
Explanation:
You start from the highest energy level to the lowest. The arrangement is: 1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p<7s<5f<6d<7p. Each box in the configuration can hold up to 2 electrons. This rule tells you to fill all boxes of one particular subshell with 1 electron first, before double occupying them.
Answer:
A, find the location
"Locate the element on the periodic table and use the atomic number to determine the number of electrons in one atom. For example, locate carbon. Carbon is atomic number 6, so it has six electrons."