Answer
10
Explanation:
goes up by 10 each time 10 to 20 to 30
It is a concave lens
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A robot character that can transform into a car
Answer:
So... for the element of NITROGEN, you already know that the atomic number tells you the number of electrons. That means there are 7 electrons in a nitrogen atom. Looking at the picture, you can see there are two electrons in shell one and five in shell two.
