which statement is true?
a the structure of so3 is shown by using more than one structural formula because so3 is very unstable and resonates between these possible structures
b the bond that includes an upper and a lower sharing of electron orbitals is called a pi bond
c there are 3 moles of atoms in 18 grams of water
d if a radioactive element with a half life of 100 years is found to have transmutated so that only 25% of the original sample remains , what is the age in years of the sample? the sample is 200 years
e nuclear fusion on the sun converters hydrogen to helium with a release of energy because some mass is converted to energy in a solar fusion
a b c d e 都對 可不可以解釋每個選項都正確
搜尋
主題 :
