Batayang Konseptwal

Element Arrangement The elements show a periodic recurrence of chemic and physical properties when they are arranged in order of increasing atomic number. Elements in the same vertical mainstay are known as groups and the horizontal rows of elements are called periods. All elements in a specific group catch equivalent outermost, or valence electron, configurations which accounts for the similarity in the number and type of chemical bonds these elements work out. In sorrowful from element to element across a period or worst a group, chemical and physical properties change gradually.Most of the elements are metals that chemically tend to lose electrons and act positive ions. The relatively few nonmetals await in the upper right-hand section of the chart except for hydrogen. The nonmetals have a tendency to react chemically with metals and gain electrons to form controvert ions. Nonmetals often bond to each other by forming covalent bonds. pedestal Metals Highly responsive e lements that combine with many nonmetals to form ionic solids (salts).They alike form compounds with oxygen that dissolve in water to create solutions that are strongly basic (alkaline). Alkaline Earth Metals Very reactive elements that form ionic compounds with nonmetals. Many of their oxygen compounds are found in deposits in the ground. Transition Metals Generally less reactive than the alkali and alkaline ball metals, these elements vary in physical and chemical properties. Many form all important(p) alloys with one another and other metals. Several of the vicissitude elements can form to a greater extent than one positive ion.For example, iron can form more than one compound with a given nonmetal since it exists as twain different ions, Fe 2+ and Fe 3+. Lanthanides Series of transition elements between lanthanum (La) and hafnium (Hf). These elements are found together in nature and they are similar chemically. Actinides Series of transition elements between actinium (Ac) and rutherfordium (Rf). Many can be prepared in instant quantities only. They tend to form insoluble compounds. Noble Gases Elements exhibit limited chemical reactivity though the heavier noble gases show degrees of reactivity.These elements have generally exhaust electron shells. Halogens Reactive elements that form compounds known as halides. Several halogens including chlorine, farad and iodine, have important applications in everyday life. Other Metals Also referred to as post transition metals. Aluminum is the most abundant metal on earth. Lead, tin and mercury have industrial uses. Other Nonmetals Includes chemically reactive elements important for life on the planet, such as carbon, oxygen, nitrogen and phosphorous. picture taking is the art, science and practice of creating durable ambits by recording light or other electromagnetic radiation, either electronically by means of an image sensor or chemically by means of a light-sensitive material such as photographic movi ng picture. The television camera is the image-forming device, and photographic film or a silicon electronic image sensor is the sensing medium. The respective recording medium can be the film itself, or a digital electronic or magnetic memory. 4Photographers control the camera and lens to expose the light recording material (such as film) to the inevitable amount of light to form a latent image (on film) or raw file (in digital cameras) which, after appropriate processing, is converted to a usable image. Digital cameras use an electronic image sensor base on light-sensitive electronics such as charge-coupled device (CCD) or completing metal-oxide-semiconductor (CMOS) technology. The resulting digital image is stored electronically, but can be reproduced on piece or film.