There are 4 significant figures! Start counting after the first non-zero digit :)
Hope this helps.
When it changes phases energy is needednto break down the bonds so that is can change state from one phase to another.
I think it’s A I’m not 100% sure but I mean it’s worth a try
Selenium falls in the same column with oxygen therefore it has the same number of valence electrons with oxygen which is 6. It fills the 3d orbital but only 4s and 4p are counted. The electronic configuration is [Ar]3d^10 4s^2.
Answer:
C
Explanation:
C because there is more in it than the rest of the idems
