Electron Configurations (Grade 10)
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Electron Configurations
1.
What is the total number of electrons in a completely filled sixth shell of an atom?
- 50
- 32
- 72
- 18
2.
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?
- 7
- 8
- 10
- 17
3.
Which element has an atom with the electron configuration 2-8-1?
- magnesium
- sodium
- calcium
- beryllium
4.
Which represents an atom of an element in an excited state?
- 2-1
- 2-8-15-2
- 2-8-10-2
- 2-7-10-2
5.
In which shell are the valence electrons of argon found?
- first
- third
- second
- fourth
6.
Which of the following noble gases does not have an octet of valence electrons?
- neon
- argon
- krypton
- helium
7.
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
8.
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
9.
Determine the total number of valence electrons in a silver atom.
10.
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.
- True
- False
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