Answer A: CO2
Reason: carbon dioxides formula is CO and the number next to it is the molecules
Answer is (4) - Pb.
According to the reactivity series of elements
- the elements which are above the hydrogen are more reactive than hydrogen.
- the elements which are below the hydrogen are less reactive than hydrogen.
Among the given choices, only Pb is placed above the hydrogen in the reactivity series and rest are below the hydrogen.
Hence, Pb is more active than hydrogen.
Answer:
It would be True
Explanation:
Because they both have the same push of gravity. Gravity affects all objects equally. If you drop an egg and a watermelon at the same time they would both collide with the floor at the same time.
Alpha particle is equivalent to B. Helium atom (2 protons, 2 neutrons)
The salt contains ionic bond so that it dissociate ultimately by the movement of ion electricity is conducted
