High levels and long periods of stress can increase a person’s risk for many diseases. True

False

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive