Error bars on four different data points are shown below.
Point 1
Point 2
Point 3
Point 4
Which of these data points is the most reliable?
point 1
point 2
point 3
point 4
Save and Exit
Next
Next
Submi
Mark this and return

what are the choices?

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

thats how its supposed to be

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.