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.
Watch Annie Sakamoto in an old-school CrossFit HQ video demonstrate a full range of rope climb techniques in a breezy 2.5 minutes. The first techniques she shows include a basic âPEâ style; the monkey wrap (not highly recommended because it is difficult to maintain good foot grip); and the thigh grab.