This special edition salutes the presidential election and keepsakes of political battles long past.
It’s a race to the toy store after Arthur realizes he may have given away his chance at two million dollars! Later, the new 18th hole at the mini golf course will be a tribute to musical instruments! No wait, an alien moon odyssey! No, a ride through the country!
When Jet realizes that it's the anniversary of Carrot and Celery's first date, he wants to recreate that first picnic they had on one of Bortron 7's moons. The kids all get involved to help create the perfect date night.
Nature Cat and his pals are enjoying a windy day by flying kites in the park. But the merriment takes a turn when a strong gust of wind blows Squeeks' kite up into the sky with Squeeks still holding onto it! Next, Daisy is determined to find out once and for all if the legendary creature, Swamp Thing, is real or not.
George measures a building with the world's longest noodle and learns about solar electricity.
The periodic table organizes elements according to their properties. Chapter 1. Discoveries of Atomic Structures 6 min Discovery of the Electron J.J. Thomson in 1897 was investigating the then mysterious cathode rays using an apparatus which is replicated in the video. By measuring the deflection of the cathode ray by a positive and a negatively charged plate above and below the ray, Thompson brilliantly calculated that the ray was composed of tiny negatively charged particles, parts of atoms. He had discovered the electron and for that won the Nobel Prize. Discovery of the Nucleus In 1911, Ernest Rutherford’s experiment is replicated in which he passes high energy alpha particles through gold foil, and particle detectors record that most pass straight through, but unexpectedly, a few are deflected backwards. Rutherford reasons that the few deflected particles must have hit a very small dense center in the gold atom, a center he chose to call a nucleus, which was surrounded by vast empty space which was why most of the alpha particles passed straight through. Since Thomson and Rutherford, scientists have discovered many more atomic particles, three of which you should know more about, protons, neutrons, and electrons. Chapter 2. Atomic Numbers and Mass Numbers 5 min. The atomic number is simply the number of protons in the nucleus. There is always one negatively charged electron for each positively charged proton in the nucleus. Hydrogen has one proton so its atomic number is 1. Helium with two protons has the atomic number 2, and Lithium with three protons, has atomic number 3. Each element in the periodic table reading left to right in each row (called a Period), has one more proton, and so has an atomic number which increases by one. The mass number is the number of protons plus neutrons in the nucleus. Hydrogen has one proton, no neutrons, so its mass number is 1. Helium has two protons plus two neutrons, so its mass number is 4. Lithium has 3 protons and 4 neutrons, so its mass number is 7. Chapter 3. Electron Shell Configurations 7 min. Electrons moving around the outside of an atom occupy a series of shells at different distances from the nucleus. This orbital picture is visualized using a group of roller blade skaters, each representing one electron moving around a set of rings drawn on the floor representing electron shells. The players illustrate how the first three shells can hold a fixed number of electrons (2.8.8) and how they fill up starting with the shell closest to the nucleus. The skaters visualize how the electrons fill up shells in Hydrogen (1 electron), Helium (2), Lithium (3), Fluorine (9), Neon (10), and Sodium (11). Elements in the same column, called a group, of the periodic table have the same number of electrons in their outer shell, which gives them similar chemical and physical properties. Group 18 on the far right, the noble gases, has no free electrons on their outer shell, and their common chemical property is virtually no reaction with other elements. In the far left group, group 1, starting with Lithium top left, and reading down the group, each element in this and every other group has one additional shell, which holds a of varying maximum number of electrons. But the outer shell of each element in this group 1, holds just one electron. Reading left to right along a row, called a period, each element will have one additional electron in its outer shell.
Peg and Cat get orders for halves of pizzas and learn about fractions to keep their patrons pleased.
Buddy and Tiny meet a shy dinosaur, Leslie Lesothosaurus, who is very good at hiding.
The kids visit the Jungle of Wagga-Tag-Tail and meet many animals with very different tails.
George learns about stretching, keeping hydrated and pacing to help Professor Wiseman win a race.
Hacker's fear rating has plummeted to near zero - almost no one is scare of him anymore!
The family vacation is diverted when Dr. Two-Brains strikes at the International Cheese Exposition.
Earth is painted in stunning colors. Learn the secret language of Earth by exploring these colors.
Murdered more than 5,000 years ago, Otzi the Iceman is the oldest human mummy on Earth.
Continue exploring India and meet a man who spent 30 years planting his own rainforest.
Jean and Lionel are greeted by an unwelcome guest and a shocking announcement when they return home.
Phryne takes on more than she bargained for when her aunt opens her home to a psychiatrist.
Watch full episodes of Scott & Bailey, Death in Paradise, and Doctor Blake Mysteries online.