8.1 Assessment
1. What is a chemical bond. It is the force that holds two atoms together.
2. Why do ions for? The form due to the face that neutral atoms become charged by losing/ gaining an electron. When this happens the outer shell of the element become happy/full.
3. What family of elements is relatively unreactive and why. Noble gases are less reactive, due to the fact they are stuck up, their outer shell is full.
4. Describe the formation of both positive and negative ions.A positive ion is made when an atom loses one more valence electrons in order become happy/full. A negative ion forms when an atom gains one or more valence electrons.
8.2 Assessment
12. What is an ionic bond? It is a force that holds oppositely charged particles.
13. How does an ionic bond for. It forms when two or more atoms gain or lose electrons.
14. List three physical properties associated with an ionic bond.
1-melting point
2-color
3-hardness.
15. Describe the arrangement of ions in a crystal latice structure. It is arrange in by size of the bond, geometric pattern ,& order.
8.3 Assessment
34. What is the difference between a monatomic ion and polyatomic ion? Monatomic ion only has one atom, and polyatomic has more than one. Mono atomic- Mg and Polyatomic-ClO-3
35. How do you determine the correct subscripts in a chemical formula? Subscripts are determined by finding the number of ions of each element in an ionic compound.
36. How are metals named in an ionic compound? Nonmetals? Polyatomic ions? The cation is named first; then the anion. Metals are first in the ionic compound, becquse they have positive ions. Non-metals comes next, because they are negatively charged. Polyatomic ions are also negatively charged, with a few exception.
3.7 What is an oxyanion and how is it named? An oxyanion is a polyatomic ion composed of an element, usually a nonmetal, bonded to one or more oxygen atoms. The ion with more oxygen atoms is named using the root of the nonmetal plus the suffix -ate.Whole the ion with less oxygen atoms us named using the root of nonmetals plus the suffix -ite.The oxyanion with one less oxygen atom us name with root of the nonmetal and the suffix- ate. Then the Oxyonian with two fewer oxygen atoms is name using the root of the nonmetal wuth the suffix -ite. The Oxyonian with three fewer oxygen atoms is name using the prefix hypo-, the root of the nonmetal, and the siffix -ite.
35. How do you determine the correct subscripts in a chemical formula? Subscripts are determined by finding the number of ions of each element in an ionic compound.
36. How are metals named in an ionic compound? Nonmetals? Polyatomic ions? The cation is named first; then the anion. Metals are first in the ionic compound, becquse they have positive ions. Non-metals comes next, because they are negatively charged. Polyatomic ions are also negatively charged, with a few exception.
3.7 What is an oxyanion and how is it named? An oxyanion is a polyatomic ion composed of an element, usually a nonmetal, bonded to one or more oxygen atoms. The ion with more oxygen atoms is named using the root of the nonmetal plus the suffix -ate.Whole the ion with less oxygen atoms us named using the root of nonmetals plus the suffix -ite.The oxyanion with one less oxygen atom us name with root of the nonmetal and the suffix- ate. Then the Oxyonian with two fewer oxygen atoms is name using the root of the nonmetal wuth the suffix -ite. The Oxyonian with three fewer oxygen atoms is name using the prefix hypo-, the root of the nonmetal, and the siffix -ite.
8.4 Assessment
40. What is a metallic bond? A metallic bond is the attraction of metallic cation for deloclized electrons.
41. Explain how conductivity of electricity and high melting point of metals are explained by metallic bonding. When metals bond, they have a lattice of positive nuclei is formed which a sea of floating electrons move between the nuclei.. It creates a strong bond between both the nuclei and electrons belonging to the alloy. Due to the strength, a large amount of energy is needed to break the bond, that is why it has a high melting point. Which means that metallic bonds do not conduct heat well.
42. What is an alloy. It is a mixture of element that have metallic properties.
43.How does substitution alloy differ from interstitial alloy?They differ in the fact that interstitial alloys are formed when small holes in the metallic crystal are filled with smaller atoms, and substitution alloys have atoms of the original metallic sold that are replaced by other metal atoms of the same size.
41. Explain how conductivity of electricity and high melting point of metals are explained by metallic bonding. When metals bond, they have a lattice of positive nuclei is formed which a sea of floating electrons move between the nuclei.. It creates a strong bond between both the nuclei and electrons belonging to the alloy. Due to the strength, a large amount of energy is needed to break the bond, that is why it has a high melting point. Which means that metallic bonds do not conduct heat well.
42. What is an alloy. It is a mixture of element that have metallic properties.
43.How does substitution alloy differ from interstitial alloy?They differ in the fact that interstitial alloys are formed when small holes in the metallic crystal are filled with smaller atoms, and substitution alloys have atoms of the original metallic sold that are replaced by other metal atoms of the same size.