Natural Numbers do not inculde 0
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No. Zero is neither positive nor negative, by definition. A positive number is greater than zero. A negative number is less than zero. Although, zero is a non-negative number (a set that includes all positive numbers and zero).
Negative first, then zero and then the positive.
Depends on what you mean. The first even number can be 0.2 or lesser. If you do not include decimal points, then I think zero is the first even number.
The whole numbers include the counting numbers, plus zero.
There are two conflicting definitions of a "natural number": these are "The set of positive integers", or "The set of non-negative integers".According to the first definition, the list of positive integers does not include 0. However, according to the second definition, this does include zero.