oh my god oh my god oh my god.
i have not been updating my blog. and tomorrow is the subject tutor report.hope this can safe me

lets see.

actually i have been missing lots of chem lesson because of my petanque competitions that fall on thursday. however i got one question that i still have not find the answer. is not really realated to what we have learn so far but i thought this is interesting

i don't know if i learn this wrongly but the protons number and the atomic mass for the elements in a increasing order rite. however in period 3, cobalt have a atomic mass of 58.9 and the following nickel have a atomic mass of 58.7.although its a slight difference, there is still a decrease.

so anyone. if u have then answer. please let me know :)