Answer:
2
Explanation:
The 1 & 2 are both signifigant becuase they are presented in scientific notation.
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Hair is dead skin cells that pile on top of each other to "grow".
Answer:
Tetrahedral electron geometry and trigonal pyramidal molecular geometry.
Explanation:
The Lewis structure is shown in Figure 1.
The central N atom has three bonding pairs and one lone pair, for <em>four electron groups</em>.
VSEPR theory predicts a tetrahedral electron geometry with bond angles of 109.5°.
We do not count the lone pair in determining the molecular shape.
The molecular geometry is trigonal pyramidal (see Figure 2).
The frequency stays the same it just gets louder