Electron Configurations (Grade 10)
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What is the total number of electrons in a completely filled sixth shell of an atom?
What is the total number of protons in an atom with two electrons in the first shell, eight electrons in the second shell, and seven electrons in the third shell?
Which element has an atom with the electron configuration 2-8-1?
Which represents an atom of an element in an excited state?
In which shell are the valence electrons of argon found?
Which of the following noble gases does not have an octet of valence electrons?
Based on electron configurations, which of the following pairs of elements contains the same number of energy levels?
- sodium and beryllium
- magnesium and calcium
- lithium and neon
- strontium and radium
Which feature of the electron configuration determine the chemical properties of an element?
- Its total number of electrons
- The number of electrons in the first shell
- The number of valence electrons
- The number of electrons in the second shell
Determine the total number of valence electrons in a silver atom.
A correct excited state electron configuration for nickel contains 1 electron in the first shell, 8 electrons in the second shell, 17 electrons in the third shell, and 2 electrons in the fourth shell.