An Atom Has Subshells 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰ in the Ground State

question 70

Multiple Choice

An atom has subshells 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰ in the ground state.What is its atomic number?

• A) 10
• B) 18
• C) 20
• D) 30
• E) More information is needed.

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