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SNC 1D1 – How Atoms Combine (Synthesis ) Metals and Non- Metals

SNC 1D1 – How Atoms Combine (Synthesis ) Metals and Non- Metals Metals that form mixtures with other atoms are called alloys. Alloys are created by melting two or more metals and then mixing these hot liquids. After mixing the alloy is allowed to solidify.

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SNC 1D1 – How Atoms Combine (Synthesis ) Metals and Non- Metals

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  1. SNC 1D1 – How Atoms Combine (Synthesis) Metals and Non- Metals Metals that form mixtures with other atoms are called alloys. Alloys are created by melting two or more metals and then mixing these hot liquids. After mixing the alloy is allowed to solidify. the resulting alloy will have the properties of both of the metals used to make it. Sterling silver is 92.5% silver and 7.5% copper. Alloys are not compounds because the metals are not chemically bound.

  2. Metals and Non-Metals • When metallic atoms such as sodium combine with non-metallic atoms like chlorine charged particles called ions usually form. • Metals lose electrons to become cations. • Non-metals gain electrons and become anions. • When there are billions and billions of ions combined together these compounds form crystals such as sodium chloride. • To name an ionic compound write the name of the metal first and then write the name of the non-metal with its ending changed to –ide.

  3. When non-metal elements combine with each other they do not lose or gain electrons to become ions. • When two non-metals combine they share electrons (electrons are located between two atoms) to form a covalent bond. • These bonded atoms form a molecule.

  4. Two hydrogen atoms can also bond with one oxygen atom to form a molecule of water. • Some common molecular compounds include:

  5. Comparison of Ionic and Molecular Compounds.

  6. Homework: Page 266 # 1 - 10

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