In the nuclear decay reaction known as electron capture, an electron from an atom's electron cloud falls into the nucleus. Iodine-128 undergoes electron capture as shown below to produce an x-ray and another product. The isotope symbol for the other product is _____. 
Definitions:
Stock Prices
The current market value of a share of a company's stock, determined by the supply and demand in the stock market.
Budget Deficit
The situation where a government's expenditures exceed its revenue.
Demand For Loanable Funds
The desire by households and firms to borrow money to finance investment projects, where the interest rate is the price of the loan.
REAL Number
A value that represents a quantity along a continuous line, including all rational and irrational numbers.
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