Isotopes are variants of a given chemical element that have nuclei with the same number of protons, but different numbers of neutrons.
Some isotopes are referred to as 'stable' as they are unchanging over time.
In recent years batteries have changed out of all recognition. Today the cells are components in battery systems, incorporating electronics and software, power management and control systems, monitoring and protection circuits, communications interfaces and thermal management. Mesopotamia, incorporating Sumer, Babylonia and Assyria, known in the West as the Cradle of Civilisation was located between the Tigris and Euphrates rivers (The name means "land between the rivers") in the so called Fertile Crescent stretching from the current Gulf of Iran up to modern day Turkey. the Sumerians of ancient Mesopotamia developed the World's first written language.
(See Map of Mesopotamia) Unfortunately this accolade ignores the contributions of the Chinese people and the Harappans of the Indus Valley, (Modern day Pakistan) who were equally "civilised" during this period practicing metallurgy (copper, bronze, lead, and tin) and urban planning, with civic buildings, baked brick houses, and water supply and drainage systems. Called Cuneiform Writing from the Latin "cuneus", meaning "wedge", it was developed as a vehicle for commercial accounting transactions and record keeping.
However, indirect reference is likely to be made to both processes, so we give these background notes in a way that could be used with children.
An interactive presentation, suitable for Key Stage 2 (8-11 year olds) describing the different parts of a plant.
Background We think of a battery today as a source of portable power, but it is no exaggeration to say that the battery is one of the most important inventions in the history of mankind.
"Either you do the work or you get the credit" Yakov Zel'dovich - Russian Astrophysicist Fortunately it is not always true.
You will need to join TES in order to download the demonstrations but it is free and only takes 30 seconds!
Strictly, neither of these words appears on the curriculum for children at this level.
It was one of the first pure metals to be used by humans.
Gold is one of the few elements that can affect politics and economics. Cities and towns have sprung up and died out as gold was discovered and then mined out.