How long will it take for 25.0 g of Ra-226 to decay to leave a total of 1.56 g? Ra-226 has a half-life of 1600 years. 8000years
4800years
3200years
6400years

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.

you gotta add the following molecules so we can give u an answer

explanation: