Science Double Award - 4SD0 PearsonEdexcel

Ionic Bonding

Bayani Gaba-gaba

Table salt dissolves in water and conducts electricity when molten, yet it has a melting point above 800 degrees Celsius. These properties seem contradictory until you understand the bonding inside: oppositely charged ions locked together by powerful electrostatic forces in a giant lattice.

In this lesson you will learn how ions form by electron transfer, memorise the charges on common ions, write formulae for ionic compounds, draw dot-and-cross diagrams, and explain why ionic substances have high melting points yet conduct electricity only when molten or dissolved.

Manufura

  1. Understand how ions are formed by electron loss or gain
  2. Know the charges of common ions
  3. Write formulae for compounds formed between listed ions
  4. Draw dot-and-cross diagrams to show the formation of ionic compounds by electron transfer
  5. Understand ionic bonding in terms of electrostatic attractions
  6. Understand why compounds with giant ionic lattices have high melting and boiling points
  7. Know that ionic compounds do not conduct electricity when solid, but do conduct electricity when molten and in aqueous solution

Taswirar tunani

An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.

Bude taswirar tunani a cikin manhaja

Katunan tunawa

Gwaji mai sauri kan abin da ake jarraba a wannan batu.

Yi atisayen wadannan katuna a cikin manhaja

Takardar Darasi

Every atom 'wants' a full outer shell of electrons, the same stable arrangement that noble gases already possess. Metals, with just one, two, or three outer electrons, can reach this state most easily by losing those electrons. Non-metals, with five, six, or seven outer electrons, reach it most easily by gaining a few. When a metal meets a non-metal, electrons transfer from one to the other, creating charged particles called ions. The attraction between these oppositely charged ions is an ionic bond.

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Nazarin Darasi

Barka da kammala darasi akan Ionic Bonding. Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

  1. What type of particle is formed when a sodium atom loses one electron? A) A negative ion B) A positive ion C) A molecule D) An isotope Answer: B
  2. What is the formula of calcium chloride? A) CaCl B) CaCl2 C) Ca2Cl D) Ca2Cl3 Answer: B
  3. Why do ionic compounds have high melting points? A) They contain molecules B) They have weak intermolecular forces C) Strong electrostatic forces act between oppositely charged ions in a giant lattice D) They are always solids Answer: C
  4. In which state can an ionic compound conduct electricity? A) Solid only B) Gas only C) Molten or in aqueous solution D) In any state Answer: C
  5. In a dot-and-cross diagram for MgO, how many electrons does magnesium transfer to oxygen? A) 1 B) 2 C) 3 D) 6 Answer: B

Yi aikin wadannan tambayoyi a cikin manhaja

Yi aikin wadannan tambayoyi a cikin manhaja

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Kana son yin aikin tambayoyin gwaji kan Ionic Bonding? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.

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