Chapter 7 Study Guide: Chemistry – Flashcards
Unlock all answers in this set
Unlock answersquestion
(7.1) Ions Key Term
answer
To find the number of valence electrons in an atom of a representative element, simply look at its group number
question
(7.1) Ions Key Term cont.
answer
A positively charged ion, or cation, is produced when an atom loses one or more valence electrons
question
(7.1) Ions Key Term cont.2
answer
An anion is produced when an atom gains one or more valence electrons
question
(7.2) Ionic Bonds & Ionic Compounds Key Term
answer
Although they are composed of ions, ionic compounds are electrically neutral
question
(7.2) Key Term cont.
answer
Most ionic compounds are crystalline solids at room temp.
question
(7.2.) Key Terms cont.2
answer
Ionic compounds generally have high melting points
question
(7.2) Key Terms cont.3
answer
Ionic compounds can conduct an electric current when melted or dissolved in water
question
(7.3) Bonding in Metals Key Term
answer
The valence electrons of an atom in a pure metal can be modeled as a sea of electrons
question
(7.3) Key Term cont.
answer
Alloys are important because their properties are often superior to those of their component elements
question
Valence Electron
answer
The electrons in the highest occupied energy level of an electrons atoms; largely determines the chemical properties of an element
question
Electron Dot Structure
answer
Diagrams that show valence electrons of an element as dots
question
Octet Rule
answer
States that in forming compounds, atoms tend to achieve the electron configuration of a noble gas; set of 8
question
Halide Ion
answer
The ions produced when atoms of chlorine and other halogens gain electrons
question
Ionic Compound
answer
A compound composed of cation and anions
question
Ionic Bonds
answer
The electrostatic forces that hold ions together in ionic compounds
question
Chemical Formula
answer
Shows the numbers of atoms of each element in the smallest representative unit of substance; ex- NaCl is sodium chloride
question
Formula Unit
answer
The lowest whole-number ration of ions in an ionic compound
question
Coordination Number
answer
The number of ions of opposite charge that surround the ion in a crystal
question
Metallic Bond
answer
The forces of attraction between the free-floating valence electrons and the positively charged metal ions
question
Alloy
answer
Mixtures of two or more elements, at least one of which is a metal
