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An

atom

is composed of my subatomic particles. We will only discuss Protons, neutron, and electrons. Protons have a positive electric charge, and neutrons have no electric charge so they are effectively neutral. Virtually all of an

atom's mass is in the protons and neutrons in the nucleus.

Electrons surrounding the nucleus have almost no mass and a negative electric charge. If the number of protons and electrons in an

atom

are equal, then an

atom

is electrically neutral because the positive and negative charges cancel out. If an

atom

has more or fewer electrons than protons, then it has an overall negative or positive charge, respectively, and it is called an

ion.

The negatively charged electrons of an

atom

are attracted to the positively charged protons in the nucleus by a force called

electromagnetic force,

for which opposite charges attract.

Electromagnetic force

between protons in the nucleus causes these subatomic particles to repel each other because they have the same charge. However, the protons and neutrons in the nucleus are attracted to each other by a different force, called

nuclear force,

which is usually stronger than the

electromagnetic force

repelling the positively charged protons from each other.

Periodic Table of the ElementsThere are almost 120 known elements. As you can see in the Periodic Table of the Elements shown in Figure 3.2.33.2.3, the majority of elements are metals. Examples of metals are iron (Fe) and copper (Cu). Metals are shiny and good conductors of electricity and heat. Nonmetal elements are far fewer in number. They include hydrogen (H) and oxygen (O). They lack the properties of metals.

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My favorite element is ,, silicon ,, used extensively as a semiconductor in solid state devices in the computer and microelectronics industries.

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Helium is a chemical element that has the symbol He and has the atomic number 2. Helium is located in the periodic table within the elements of the first cycle and at the top of the eighteenth group elements and has two protons and two neutrons in its nucleus and is surrounded by two electrons.

Fatima hamad

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Mahra khalid 7-5
My favorite element is gold because is sheyn
The Gold is a chemical element with the symbol Au (from Latin: aurum) and atomic number 79, making it one of the higher atomic number elements that occur naturally. In a pure form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal and a group 11 element

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hello my name is meera abdullah grad 7/5

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hello my name is meera abdullah grad 7/5

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my favorite element is nitrogen i like the large number of oxidatione states nine range from 5+to 3-, and even includes a value of 1/3 mints fore the redox chemistry is rather involved but largely predictabl as a often included some equations to be comeplet and balanced from group va now 15.

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my favorite element is ,,silicon,,used extensively as a semiconductor in solid state devices in the computer and microelectronics industries.

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my favorite element is carbon

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my favorite element is gold becouse it is sheyn and light couler and it is sould the matter of gold is 79 .

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My fovorirte element is oxygen is the chemical element with the symbol O and atomic number 8.

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my favorite element silve

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My favorite element is hydrogen

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In chemistry, an element is a pure substance which cannot be broken down by chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei. The number of protons in the nucleus is the defining property of an element, and is referred to as the atomic number (represented by the symbol Z).[1] Chemical elements constitute all of the baryonic matter of the universe.

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my favorite element is hydrogen!
hydrogen is the chemical

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My favorite element is gold Au 79

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my favorite element is carbon

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my  favorite element

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my favorite element is oxygen is the

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Fatima Hamad

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my favorite element is oxygen is the number8.it is a member of the chalcogen group in the periodic table a highly reactive nonmetal and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.

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i love oxygen becouse oxygen is used by animal and plant in the respiration (breathing )process. tanks of oxygen are used in medicine to treat people with brething problems . they are also used as life support for astronauts and scuba divers . the majority of the oxygen used in industry is used in the manufacturing of steel

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my favorite element it is oxygen because without him the people can not live in this life ,

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symbol is a chemical elemunt that has the symbol he and has the atome numuber 2.periodic table and on top of the eighth grop elemunt and has two protons and two neutroun in its nucleus surrounded by two electurs 5 temperature in the usual temperature temperatrue.

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gold is element 79 and its  symbol is Au though  the name is Anglo Saxongold ; gold originated forom the Latin Aurum
or shining dawn and previosly

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7-5
1-Hydrogen
2-Helium
3-Oxygen
4-Carbon
5-silicon
6-silver
7-iron
what mean element ?
is made up of jest one type of atom
-My favorite element is silver is a chemicl element with the symbol Ag . it is used to bring patience and perseverance to the wearer when silver is used with gemstones the metal retains and amplifies the qualities emitted by the stones .

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Properties, uses, and occurrence

Together with gold and the platinum-group metals, silver is one of the so-called precious metals. Because of its comparative scarcity, brilliant white color, malleability, ductility, and resistance to atmospheric oxidation, silver has long been used in the manufacture of coins, ornaments, and jewelry. Silver has the highest known electrical and thermal conductivity of all metals and is used in fabricating printed electrical circuits and as a vapor-deposited coating for electronic conductors; it is also alloyed with such elements as nickel or palladium for use in electrical contacts. Silver also finds use as a catalyst for its unique ability to convert ethylene to ethylene oxide, which is a precursor of many organic compounds. Silver is one of the noblest-that is, least chemically reactive-of the transition elements.

Silver ornaments and decorations have been found in royal tombs dating back as far as 4000 bce. It is probable that both gold and silver were used as money by 800 bce in all countries between the Indus and the Nile.

Silver is widely distributed in nature, but the total amount is quite small when compared with other metals; the metal constitutes 0.05 part per million of Earth's crust. Practically all sulfides of lead, copper, and zinc contain some silver. Silver-bearing ores may contain amounts of silver from a trace to several thousand troy ounces per avoirdupois ton, or about 10 percent.

Unlike gold, silver is present in many naturally occurring minerals. For silver the more important deposits commercially are such compounds as the minerals tetrahedrite and argentite (silver sulfide, Ag ₂S), which is usually associated with other sulfides such as those of lead and copper, as well as several other sulfides, some of which contain antimony as well. Silver is found generally in lead ores, copper ores, and cobalt arsenide ores and is also frequently associated with gold in nature. Most silver is derived as a by-product from ores that are mined and processed to obtain these other metals. Deposits of native (chemically free, or uncombined) silver are also commercially important.

Because the majority of the ores that contain silver also contain the important metals lead, copper, or zinc or a combination of the three, the silver-bearing fraction of these ores is frequently recovered as a by-product of copper and lead production. Pure silver is then recovered from the crude fraction by a combination of smelting and fire- or electrorefining. (For treatment of the recovery and refining of silver, see silver processing.)

country

mine production 2016 (metric tons)*

% of world mine production

demonstrated reserves 2016 (metric tons)*

% of world demonstrated reserves**

*Estimate.

**Includes silver obtainable from base-metal ores.

***Detail does not add to total given because of rounding.

Source: U.S. Department of the Interior, Mineral Commodity Summaries 2017.

Historically, a major use of silver has been monetary, in the form of reserves of silver bullion and in coins. By the 1960s, however, the demand for silver for industrial purposes, in particular the photographic industry, exceeded the total annual world production. In the early 21st century, digital cameras supplanted those that used film, but demand for silver from other sectors-such as for sterling and plated silverware, ornaments, jewelry, coinage, electronic components, and photovoltaic cells-continued to be important.

Alloys of silver with copper are harder, tougher, and more fusible than pure silver and are used for jewelry and coinage. The proportion of silver in these alloys is stated in terms of fineness, which means parts of silver per thousand of the alloy. Sterling silver contains 92.5 percent of silver and 7.5 percent of another metal, usually copper; i.e., it has a fineness of 925. Jewelry silver is an alloy containing 80 percent silver and 20 percent copper (800 fine). The yellow gold that is used in jewelry is composed of 53 percent gold, 25 percent silver, and 22 percent copper. (For treatment of silver's use in ornamental and household objects, see metalwork.)

Natural silver consists of a mixture of two stable isotopes: silver-107 (51.839 percent) and silver-109 (48.161 percent). The metal does not react with moist air or dry oxygen but is oxidized superficially by moist ozone. It is quickly tarnished at room temperature by sulfur or hydrogen sulfide. In the molten state, silver can dissolve up to 22 times its volume of oxygen; on solidification, most of the oxygen is expelled, a phenomenon known as the spitting of silver. This can be controlled by the addition of a deoxidant such as charcoal to the molten silver. Silver dissolves readily in nitric acid and in hot concentrated sulfuric acid. The metal will also dissolve in oxidizing acids and in solutions containing cyanide ions in the presence of oxygen or peroxides. Dissolution in cyanide solutions is attributable to the formation of the very stable dicyanoargentate, [Ag(CN) ₂] −, ion.

Like copper, silver has a single s electron outside a completed d shell, but, in spite of the similarity in electronic structures and ionization energies, there are few close resemblances between silver and copper.

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Silver, chemical element of atomic number 47, a white lustrous metal valued for its decorative beauty and electrical conductivity. Silver's physical and chemical properties are intermediate between those of copper and gold. It is located in Group 11 of the periodic table.