Alpha particles. Alpha particles are made of 2 protons and 2 neutrons. This means that they have a charge of +2, and a mass of 4. (the mass is measured in atomic mass units, where each proton & neutron=1) We can write them as , or, because they're the same as a helium nucleus, . Alpha particles are relatively slow and heavy.
For more, visit TIME Health. 1  The average attention span for the notoriously ill-focused goldfish is nine seconds, but according to a new study from Microsoft Corp., people now generally lose concentration after eight seconds, highlighting the affects of an increasingly digitalized lifestyle on the brain.
No âaverageâ attention span. There is simply no number that can be put on an attention span. Consequently, there can be no average. Some of us can focus on a three-hour concert, but fifteen minutes spent doing our taxes will leave us bored and begging for mercy. For others, the opposite is true.