The Science of Cooking Guided Inquiry Activity #2 Bonding Model 1. When at least

Question

The Science of Cooking Guided Inquiry Activity #2 Bonding Model 1. When at least two atoms are joined together by bonds, a molecule is formed. A compound is formed from the bonding of atoms from at least two different elements. The two electrons being shared This joins the atoms together A line hetween two atoms indicates they are joined by a cevalent bond two lines represent a HHOdouble covalent bond the molecule gbycise H .NC A covaient bond is formed by the sharing of TWO electrons. The straight line represents these electrons. Electrons are very tiny particles with negative charge. Every atom of each unique element has a specific number of electrons. For example, every hydrogen atom has one electron. In some cases, the electrons are not shared. In the compound, NaCI or sodium chloride, the Cl anion has extra electrons which give the Cl an overall negative charge. The Na cation has too few electrons, which give the Na an overall positive charge. The association between the Na" and Cl is called an ionic bond. Figure 2.1. Covalent and ionic bonds. In the compound sodium chloride, the sodium cation is always carrying a positive charge (Na') and the chloride anion is always carrying a negative charge(CT), but sometimes the compound will be represented as Nacl-without the charges explicitly shown- see Activity 1 for a review of this concept. 1. Define the word molecule using the words atoms and bond

Explanation / Answer

1) A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction is called molecule. Molecules are made up of atoms that are held together by chemical bonds.

2) 4 electrons between carbon and oxygen bonded by the double bond.

3) a) each carbon "1" is surrounded by 4 bonds and carbon "2" also surrounded by 4 bonds.

b) 8 electrons(=4bonds x 2electrons) are surrounded by each carbon atom 1 and 2.

4) electrostatic force present between oppositely charged Na+ and Cl- in NaCl.

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