Question

how many dots would be shown in the lewis dot diagram for nitrogen?
7
5
3
2
what does a lewis dot diagram represent?
the nucleus of an atom.
the number and arrangement of valence electrons around an atom.
the total number of electrons in an atom.
the number of protons in an atom.

Explanation:

1. Nitrogen has an atomic number of 7, and its electron - configuration is 1s²2s²2p³. The number of valence electrons (electrons in the outermost shell) is 5. In a Lewis - dot diagram, each dot represents a valence electron, so for nitrogen, there are 5 dots.
2. A Lewis - dot diagram is used to show the number and arrangement of valence electrons around an atom. It does not represent the nucleus, the total number of electrons, or the number of protons.

Answer:

1. B. 5
2. B. The number and arrangement of valence electrons around an atom.