Write the correct electron configurations for the following: ments
ions
• Na (atomic # 11)
• Fe (atomic # 26)
• As (atomic # 33)
• F (atomic #9)
• Co (atomic #27)
• Ag (atomic # 47)
• K (atomic # 19)
• Cu (atomic # 29)
• Si (atomic # 14)

Na- 1s^2 2s^2 2p^6 3s^1

Fe- 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^6

As- 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^3

F- 1s^2 2s^2 2p^5

Sun is explosive itself spread 9 planets.earth is 3rd explosive in the solar system about 500 hundred million years ago . first earth became ice age and freezing climate.centre of earth magma. north zone is artic . south is anatric

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic