Answer:
hope this helped :( got this from my friend a long time ago but still not sure if it's really correct this
Answer:
B) 82 protons
Explanation:
The number of protons for an element never change. 82 Is the atomic number for Pb which is how many protons it has. An isotope means it has more neutrons.
Answer:
A skater moving downhill at increasing speed
Explanation:
- A push or pul on object called force .It is of two types.
- Balanced force
- Unbalanced force
Mendeleev arranged the elements according to their atomic masses