Answer:
oxygen is an example of a diatomic molecule found in earth's atmosphere!
Explanation:
CaO
Calcium reacts with oxygen to form calcium oxide. The chemical equation for this reaction is Ca + O2 → CaO.
The isotopes 55Fe and 58Fe are both Iron, but have a different atomic mass due to the added number of neutrons. Both isotopes have 26 protons, but 55Fe has more neutrons.
Manganese alone cannot be a catalyst. However, its oxides can work as a catalyst. Manganes (II, III) oxide has found some applications in certain reactions as a catalyst. These reactions are the oxidation of methane, carbon monoxide, decomposition of NO and the catalytic combustion of organic compounds.
Answer:
Transition metal
Explanation:
The elements in the middle are called Transition metal and the have similarity in the atomic structure resulting in similar properties, for example they are less reactive than the alcaline earth metals
