Which of these statements about an atom is incorrect?

The atomic mass of fluorine (F) is 19.00. Which of the following is not true?

Nonmetals tend to _____ electrons to form _____ ions.

Strontium is a member of which group/family?

In the continuous positive airway pressure (CPAP) mode, the ventilator provides _____ pressure level(s) to the patient, whereas in the bilevel positive airway pressure (BiPAP) mode it provides pressure level(s).

If the BiPAP device does not have a separate CPAP control, a CPAP level of 4 cm H2O may be obtained by setting the:

To explain natural phenomena, scientists must _____.

Show the set up clearly for credit.  Give your answer to the correct significant figures and include the correct unit(s). 1.  565 mL = ___________L 2.  4.5 in = __________ cm 3.  A 35 mL sample of salt water solution has a mass of 37.5 g.  What is the density of this solution?

Since NPPV is done without a(n) _________, patients who are unable to handle secretions should not be placed on NPPV because _________ can be a potential problem.

Which of these statements about the scientific method is incorrect?