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.
The findings revealed human attention span has fallen from an average of 12 seconds in the year 2000 to just eight seconds today. Humans now have less of an attention span than a goldfish (nine seconds average).The decrease was seen across all age groups and genders in the study.he findings revealed human attention span has fallen from an average of 12 seconds in the year 2000 to just eight seconds today. Humans now have less of an attention span than a goldfish (nine seconds average).