this is a science question so please help!! what is an element?

Answer 1

A chemical element, often called simply an element, is a substance that cannot be decomposed or transformed into other chemical substances by ordinary chemical processes. All matter fundamentally consists of these elements and as of 2006, 116 unique elements have been discovered or artificially created. The smallest particle of such an element is an atom, which consists of electrons centered about a nucleus of protons and neutrons.

The lightest elements are hydrogen and helium. Hydrogen is thought to have been the first element to appear after the Big Bang. All the heavier elements are made, both naturally and artificially, through various methods of nucleosynthesis. As of 2005, there are 116 known elements: 93 occur naturally on earth (including technetium and plutonium), and 94 (including promethium) have been detected in the universe at large. The 23 elements not found on earth are derived artificially; technetium was the first purportedly non-naturally occurring element to be synthesized, in 1937, although trace amounts of technetium have since been found in nature. All artificially derived elements are radioactive with short half-lives, so if any atoms of these elements were present at the formation of Earth are extremely likely to have already decayed.

Lists of the elements by name, by symbol, by atomic number, by density, by melting point, and by boiling point as well as Ionization energies of the elements are available. The most convenient presentation of the elements is in the periodic table, which groups elements with similar chemical properties together.

Answer 2

An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is.

If you had very, very good eyes and could look at the atoms in a sample of hydrogen, you would notice that most of the hydrogen atoms would have no neutrons, some of them would have one neutron and a few of them would have two neutrons. These different versions of hydrogen are called isotopes. All isotopes of a particular element have the same number of protons, but have a different number of neutrons. If you change the number of neutrons an atom has, you make an isotope of that element.

At this time, scientists know of 116 different elements. Some, like gold, silver, copper and carbon, have been known for thousands of years. Others, such as meitnerium, darmstadtium and ununquadium, have only recently been created by scientists. All known elements are arranged on a chart called the Periodic Table of Elements.

Answer 3

An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is.

Answer 4

el‧e‧ment  /ˈɛləmənt/ Pronunciation Key - Show Spelled Pronunciation[el-uh-muhnt] Pronunciation Key - Show IPA Pronunciation

–noun 1. a component or constituent of a whole or one of the parts into which a whole may be resolved by analysis: Bricks and mortar are elements of every masonry wall.
2. Chemistry. one of a class of substances that cannot be separated into simpler substances by chemical means. See also chart under periodic table.
3. a natural habitat, sphere of activity, environment, etc.: to be in one's element; Water is the element of fish.
4. elements, a. atmospheric agencies or forces; weather: a ruddy complexion from exposure to the elements.
b. the rudimentary principles of an art, science, etc.: the elements of grammar.
c. the bread and wine of the Eucharistic service.

5. any group of people singled out within a larger group by identifiable behavior patterns, common interests, ethnic similarities, etc.: He worried that the protest rally would attract the radical element.
6. one of the substances, usually earth, water, air, and fire, formerly regarded as constituting the material universe.
7. Mathematics. a. an infinitesimal part of a given quantity, similar in nature to it.
b. an entity that satisfies all the conditions of belonging to a given set.

8. Geometry. one of the points, lines, planes, or other geometrical forms, of which a figure is composed.
9. Astronomy. any of the data required to define the precise nature of an orbit and to determine the position of a planet in the orbit at any given time.
10. Electricity. an electric device with terminals for connection to other electrical devices.
11. Radio. one of the electrodes in a vacuum tube.
12. Astrology. any of the four triplicity groupings of signs: fire, earth, air, or water.
13. Optics. any of the lenses or other components constituting an optical system.
14. Grammar. any word, part of a word, or group of words that recurs in various contexts in a language with relatively constant meaning.


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[Origin: 1250–1300; ME (< AF) < L elementum one of the four elements, letter of the alphabet, first principle, rudiment]


—Synonyms Element, component, constituent, ingredient refer to units that are parts of whole or complete substances, systems, compounds, or mixtures. Element denotes a fundamental, ultimate part: the basic elements of matter; resolve the problem into its elements. Component and constituent refer to a part that goes into the making of a complete system or compound. Component often refers to one of a number of parts: a new component for the stereo system. Constituent suggests a necessary part of the whole: The constituents of a molecule of water are two atoms of hydrogen and one of oxygen. Ingredient is most frequently used in nonscientific contexts: the ingredients of a cake; the ingredients of a successful marriage.

Answer 5

Fail troll is fail... technological expertise is a physique of expertise it fairly is not a perception. Giovanni Virginio Schiaparelli (March 14, 1835 – July 4, 1910) became an Italian astronomer and technological expertise historian who if reality be told did checklist viewing the canals on Mars which he attributed to extraterrestrial existence. So your declare approximately cosmologists is a pretend mischaracterization and borders on libellous fraud. As for "dime-save novelists" (which with the help of how have not existed through fact Schiaparelli's time) and "computing device-nerds" and "conspiracy-theorists" none of those are extremely heavily linked with "imagining that the universe could be full of existence". technological expertise fiction is a mainstream form now, and has been through fact the Nineteen Seventies. if reality be told for 12 out the final 15 years the actual grossing action picture of the 365 days became a technological expertise fiction action picture, so imagining a universe full of existence is fairly an industry rather worth 1000's of billions of greenbacks. the seek for extraterrestrial intelligence (SETI) is the collective call for various activities human beings undertake to seek for clever extraterrestrial existence. many of the main nicely regularly occurring initiatives are run with the help of the SETI Institute. SETI initiatives use medical basic procedures to seek for clever existence on different planets. for occasion, electromagnetic radiation is monitored for indications of transmissions from civilizations on different worlds. at present scientists at NASA are examining meteorites which they think of might contain fossilized evidence of extra-terrestrial existence. you could hate technological expertise in case you like yet technological expertise is only the physique of expertise we've collected with regard to the universe so it should not be grew to become the different way up with the help of the invention of a few thing new, we study some thing new in technological expertise some hundred circumstances an afternoon and that new expertise is only extra to the growing to be expertise base. If extra-terrestrial existence is ever discovered the folk who will come across it are maximum probably to be scientists - through fact we are people who're finding for it.

Answer 6

A subtance that is gas, solid, liquid, or synthesized that can't be broken down to simpler substances. (2 elements or more create a compound)