Bismuth can undergo beta decay. Which of the elements listed in the table does a bismuth nucleus become when it undergoes beta decay? * Captionless Image
Thallium
Lead
Bismuth
Polonium

Chemistry worksheet - i am not sure what they are asking for exactly?

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?

Nitrogen dioxide decomposes according to the reaction 2 no2(g) ⇌ 2 no(g) + o2(g) where kp = 4.48 × 10−13 at a certain temperature. if 0.70 atm of no2 is added to a container and allowed to come to equilibrium, what are the equilibrium partial pressures of no(g) and o2(g)