A particle of an element, which sits outside the nucleus.
Fact of the Day
33 years after toilet paper was invented in Green Bay, Wisconsin, it was finally advertised as 'splinter free'.
Quote of the Day
"I have taken great care not to laugh at human actions, not to weep at them, nor to hate them, but to understand them. "
~ Baruch Spinoza
On This Day
1829 The Roman Catholic Relief Act received royal assent. It allowed British Catholics to vote, hold public office, and sit in parliament.
1912 The Royal Flying Corps was founded.
1919 British troops slaughter hundreds of unarmed Indian civilians in Amritsar at the Jallianwala Bagh Massacre.
1970 Late in the evening, an explosion in one of the oxygen tanks after a routine procedure caused crisis and a mission abort for Apollo 13.