10. Periodic Properties of the Elements

Which of the following is the correct electron configuration for a neutral atom of nickel (atomic number 28)?

Where are the electron particles located in an atom?

In a neutral atom, how many electrons can occupy the electron shell closest to the nucleus (the first shell)?

Which of the following electron configurations best represents how electrons are arranged in the energy levels of a carbon atom?

Which of the following electron configurations for neutral atoms represents an excited state?

Which of the following is the correct electron configuration for Mg?

Which of the following is the correct ground-state electron configuration for molybdenum (Mo, z = 42)?

How many 5d orbitals are present in an atom?

Which of the following is the correct electron configuration for an atom of silicon?

Why is the current atomic model referred to as the 'electron cloud model'?

Which of the following is the correct electron configuration for zirconium (atomic number 40)?

Which atom has the electron configuration 1s2 2s2 2p6 3s2 3p6?

Which element has a total of five occupied principal energy levels?

In a multi-electron atom, which of the following orbitals will have the highest energy?

How many electrons can an atom have in its first electron shell (n = 1)?