Answer:
HERE'S MY UNDERSTANDING OF THE DIFFERENCE
C is true, and just one of those has as much mass as about 1,840 electrons.
Answer:
4/3
Explanation:
Shown in the picture attached
Answer:
False
Explanation:
All the lanthanides are not radioactive in nature. Just one of the lanthanides are radioactive.
- The lanthanides belong to the f-block on the periodic table
- Only Promethium in this group are radioactive in nature.
- Other elements in the lanthanide series might have radioactive isotopes.