More videos on YouTube

proton

Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter “P.” Neutrons have no electrical charge.

A nucleus is made up of protons and neutrons. Protons have a positive charge and neutrons have a neutral charge. Since a neutral charge won’t cancel out a positive charge, the overall charge of a nucleus is positive.

The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

The strong nuclear force. At extremely short range, it is stronger than electrostatic repulsion, and allows protons to stick together in a nucleus even though their charges repel each other.

Alpha particles carry a positive charge, beta particles carry a negative charge, and gamma rays are neutral. Alpha particles have greater mass than beta particles.

Without medical treatment, nearly everyone who receives more than this amount of radiation will die within 30 days. 100,000 roentgens/rad (1,000 Gy) causes almost immediate unconsciousness and death within an hour.

Tiny amounts of radiation have continued leaking into the sea and elsewhere through underground passages, though the amount today is small and fish caught off the coast are safe to eat, scientists say.

Japan’s government announced a decision to begin dumping more than a million tons of treated but still radioactive wastewater from the crippled Fukushima nuclear plant into the Pacific Ocean in two years.

The Tōhoku earthquake and tsunami killed over 15,000 people from effects unrelated to destruction of the reactors at Fukushima….Fukushima Daiichi nuclear disaster casualties.