Determine the number of each type of atom in each of the following formulas.
1. NH4Cl
2. Mg3(PO4)2
3. NaCN
4. Ba(HCO3)2
Express your answers as integers. Enter your answers numerically separated by commas.

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding. i