Isotope - the same element, but different atomic mass so 1)35 Cl and 37 Cl
Its 4 dude i did this already
Answer:
clf3
Explanation:
it occupied more than 8 valence electrons
2.26%, 26.8%, 2 2/5, 2.62, 271%
Hope this helps! :D
Answer:bromine , neon , helium , argon , lithium , beryllium
Explanation: