Table of contents

1. The Chemical World9m
- The Scientific Method
  9m
2. Measurement and Problem Solving2h 19m
3. Matter and Energy2h 15m
4. Atoms and Elements2h 33m
5. Molecules and Compounds1h 50m
6. Chemical Composition1h 23m
7. Chemical Reactions1h 43m
8. Quantities in Chemical Reactions1h 8m
9. Electrons in Atoms and the Periodic Table2h 32m
10. Chemical Bonding2h 10m
11 Gases2h 7m
12. Liquids, Solids, and Intermolecular Forces1h 11m
13. Solutions3h 1m
14. Acids and Bases2h 14m
15. Chemical Equilibrium1h 27m
16. Oxidation and Reduction1h 33m
17. Radioactivity and Nuclear Chemistry53m

9. Electrons in Atoms and the Periodic Table

Valence Electrons of Elements (Simplified)

Introduction to Chemistry

9. Electrons in Atoms and the Periodic Table

Valence Electrons of Elements (Simplified)

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Multiple Choice

How many inner core and valence electrons does the nitrogen atom possess?

inner core = 4; valence = 3

inner core = 2; valence = 3

inner core = 2; valence = 5

inner core = 4; valence = 5

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Verified step by step guidance

Start by identifying the atomic number of nitrogen, which is 7. This means a neutral nitrogen atom has 7 electrons.

Understand the concept of electron configuration, which describes the distribution of electrons in an atom's orbitals. For nitrogen, the electron configuration is 1s² 2s² 2p³.

Determine the inner core electrons. These are the electrons in the filled inner shells. For nitrogen, the inner core electrons are those in the 1s orbital, which is 1s², totaling 2 electrons.

Identify the valence electrons. Valence electrons are those in the outermost shell that participate in chemical bonding. For nitrogen, the valence electrons are in the 2s and 2p orbitals, which are 2s² 2p³, totaling 5 electrons.

Summarize the findings: Nitrogen has 2 inner core electrons and 5 valence electrons.