Which of the following molecules
a) h₂s b) ph₃c) ch₄d) h₂so₃ are likely to form hydrogen bonds?
read all choices carefully.
1. a and d only
2. none form hydrogen bonds.
3. c and d only
4. b and d only
5. a and c only
6. a and b only
7. b and c only
8. all are likely to form hydrogen bonds.
9. none of the other choices are correct.

answer: i dont know the answer but this might

explanation:

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answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.