Answer:
I think it might be elements and compounds! I may be wrong though.
The lowest point of a wave is called trough.
External fertilization in animals usually occurs in water or in damp areas in a process called spawning.
Answer:True
Explanation:
Most of the transition metals—those metals in the center d-block of the periodic table—are polyvalent. Since they can form cations with different charges, those charges must be specified when naming the ions and when naming compounds containing those ions.
If you found my answer useful then mark me brainliest.
Here we have to choose the best statement, among the given, in the chemical reaction between the substance sodium (Na) and oxygen (O₂) to form Na₂O.
The suitable statement is sodium oxide is created by the B. chemical reaction.
The reaction between Na and O₂ is 4Na + O₂ = 2Na₂O.
The compound Na₂O is entirely is a new compound and not generated by the rearrangement of the reactant. Here the sodium and oxygen is destroyed and forms Na₂O.
There is no separate atoms in Na₂O it is a compound made by the two atoms Na and O₂.
In a mixture of the three substances sodium oxide can be separated from Na and O₂ but it depends upon the physical property of the reactant and product. If the reactant and product both are in gaseous state they cannot be separated by any physical methods.
