NATIONAL PERIODIC TABLE DAY
National Periodic Table Day is observed annually on February 7.
To understand the development of the periodic table, we first must understand the discovery of elements and their effect on science.
Elements known to ancient man were few. Gold, silver, copper, iron, lead, tin, mercury, sulfur and carbon were the earliest known elements. These were all known prior to the 1st century A.D.
Over time, arsenic, antimony, phosphorus and zinc were discovered. By 1809 there were 47 discovered elements.
One of the earliest attempts to organize the elements was by Johann Döbereiner in 1817. He organized elements into groups of three, or triads, based on similar qualities.
On February 7, 1863, English chemist John Newlands published one of the first table of elements, which divided the known 56 elements into 11 groups based on the “Law of Octaves.” This suggested that any one element will have similar properties to elements eight places before and behind it on the table.
Arranging the elements according to increasing atomic weight, Newlands was one of the first scientists to detect a pattern to the properties of elements. As a result, his table left room for new discoveries, predicting future discovered elements would complete the table. Newlands correctly predicted the discovery of Germanium.
While parts of Newlands periodic table had flaws, so did other later proposed tables. In 1869 chemist Dimitri Mendeleev published a paper developing a periodic table arranging the elements also based on atomic mass. By this time only 60 of the over 100 elements we know today were discovered.
For more information, please see the National Day Calendar page for National Periodic Table Day.
NATIONAL FETTUCCINE ALFREDO DAY
National Fettuccine Alfredo Day is observed annually on February 7th.
Alfredo di Lelio, and Italian restaurateur, created Fettuccine Alfredo in 1908. After his wife gave birth to their first son that year, she did not have an appetite. To help encourage her to eat, he created a dish of noodles, cheese and butter. She liked the dish so much that she thought he should put it on the menu at his small restaurant in Rome. Everyone around the world has been enjoying this dish ever since. Today it is one of the most popular pasta dishes in America.
HOW TO OBSERVE
You can enjoy this delicious pasta at a favorite restaurant or try this delicious recipe at home: Primo Fettuccine Alfredo recipe.
Use #FettuccineAlfredoDay to post on social media.
We have learned the history of Fettuccine Alfredo however research of this unofficial national holiday has failed to find the creator of this day.
For more information, please visit the National Day Calendar page for National Fettuccine Alfredo Day.
NATIONAL SEND A CARD TO A FRIEND DAY
We often think about our friends. We wonder how they are, miss them and remember fond memories of times shared. Always observed on February 7th, National Send A Card To A Friend Day is the day to send our friends a card and let them know that we are thinking of them!
It is always a nice surprise to receive a card from a friend.
HOW TO OBSERVE
Send a card to your friends. With the technology we have,we can also send Ecards. You can buy cards at a store or you can make them yourself. Whichever way you choose, set aside a few minutes to write a short note or a long note in a card and send one to make a friend’s day! Use #SendACardToAFriendDay to post on social media.
Within our research we were unable to identify the creator of National Send a Card to a Friend Day.