The model below shows a calcium atom. How many electrons are in the third energy level?
O 2
O 8
O 18
O 20
og

first energy level:1s2=2 electrons

2nd energy level:2s2 2p6=8 electrons

3rd energy level 3s2 3p6=8 electrons

B.8

Explanation:

Ca=20

K L M N

2 8 8 2

The third energy level of an atom (with atomic number 20 and above) contains 8 electrons.

a

explanation:

the  different  of  these  two  are  that  they  differently  handle  their  team.

an  expressive  leader  focuses  on  the  task  at  hand  and  make  sures  that  their  goal  is  achieved.  they  accurately  finish  the  task.  an  instrumental  leader  on  the  other  hand  works  on  the  unity  of  the  group,  they  care  more  about  their  employees.  all  the  while  creating  a  good  environment.