Answer: Correct statements are given below:
1) In activity series elements are listed according to their reactivity.
2) Nuclear reaction in which low atomic nuclei fuse to form a heavier nucleus with the release of energy. Nuclear fusion reaction occurs in the sun.
3) C3H8 + 5O2 → 3CO2 + 4H2O is the example of a combustion reaction.
4) 2Fe + O2 → 2FeO is the example of synthesis reaction. In synthesis reaction is a type of reaction in which two reactants combine to form a single product.
Most of them are . probably not all though
Democritus described oil atoms things made up of minute (small), indestructible and invisible particles of pure matter that can and may move freely.
Answer:
Limestone is a pure substance
Explanation:
It includes many elements and compounds that make it more difficult to break down Limestone.
Answer:
2 Na atoms
1 C atom
3 O atoms
gram formula weight = 105.99 g
hope this helped :)