Match the following polyatomic lons.
1. NO3-
2. (S0⁴)²-
3. NH⁴+
4. (CO³)²
5. Mn0⁴
6. (PO⁴)³
7. C²H³0²
8. (CrO⁴)²-
9. (Cr²0⁷)²-
10. SO3²-

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

What is the percent by mass of oxygen in fe2o3