nuclear decay equation question

Chemistry
Tutor: None Selected Time limit: 1 Day

Hafnium (Hf), with a mass number of 174 and an atomic number of 72, decays by emission of an alpha particle. Identify the product of the nuclear reaction by providing its atomic symbol (5 points), mass number (5 points), and atomic number (5 points). (Points : 15)

Oct 22nd, 2015

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Oct 22nd, 2015

Cant read what you wrote on the left margin or on the second line next to atomic number 

Oct 22nd, 2015

Thats the  name of the compound. Ytterbium (Yb)

Oct 22nd, 2015

What is in the left margin T74? or just 74, and is it 72?

Oct 22nd, 2015

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Oct 22nd, 2015
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Oct 22nd, 2015
Feb 21st, 2017
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