Classify the following reactions as synthesis, decomposition, single replacement or double replacement. Type your answer in the box to the right of each equation.

5) Mg + 2HCl → H2 + MgCl2
6) 2H2O2 + 2H2O + O2
7) HCl + AgNO2 → AgCl + HNO2
8) 2Na + Cl2 + 2NaCl

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

What shape would a molecule with two bound groups and two lone pairs have?

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?