B. At-200
In beta decay the atomic number increases by 1
Just as a dozen is 12 of something, a mole is about 6.02 * 10^23 of something .
<span><span>Dipole-dipole interactions , example: ammoni </span><span>forces, example: methane, CH4</span><span>Hydrogen bonding example: water, H2O </span></span>
Water containing carbonic acid and calcium