Section 5 Study Guide Flashcards
A mixture is different from a compound because each substance in a mixture __
retains its own properties
Each molecule of hydrochloric acid, HCl, contains one atom of hydrogen and __
one atom of chlorine
Which substance do the molecules have the strongest attractions to one another?
sugar, a solid
Often atoms join so that each atom will have __
an outermost energy level that is full of electrons
In a metallic bond, the nucleus of one atom is attracted by a nearby atoms’s __
electrons
Solid ionic compounds have very high melting points because they __
contain charged ions that are locked tightly together
The name for the compound with the formula CuBr2 would be written as __
copper (II) bromide`
Formaldehyde, CH2O, and acetic acid, C2H4O2, have the same empirical formula but different __
molecular formulas
The simplest organic compound is ___
methane
Polymers are large organic molecules that are made of __
repeating units
A protein is a polymer that is made of __
amino acids
Unlike a mixture, a compound has a ___ that is always the same
chemical formula
Formula units of salt, NaCl, contain equal numbers of __ and __
sodium ions, chloride ions
A ___ formula resembles a ball and stick model of a compound except chemical symbols are used to represent the atoms
structural
In ionic compounds, the positive charged ions are formed from __ elements
metal
A __ bond is formed by the attraction between positively charged metal ions and the electrons around them
metallic
A compound consisting of Br- and CD2+ ions would be named
cadmium (II) bromide
The simplest formula for a covalent compound is its __ formula
empirical
__ are compounds that have repeating subunits
polymers
The forces that hold different atoms or ions together are __
chemical bonds
Each molecule of table sugar, C12H22011, contains __ atoms of carbon
12
Gases take up a lot of space because gas molecules __
are not attracted to one another
Covalent bonds are formed between __
nonmetal atoms
Copper is a good conductor of electricity because its electrons
can move from atom to atom
The name dinitrogen tetroxide tells you that this compound contains _ N atoms and _O atoms
2; 4
When copper combines with oxygen to form copper (II) oxide, the charge of the copper ion is __
Cu2+
It is possible for different covalent compounds to have the same empirical formula because empirical formulas represent __
a ration of atoms in the compound
How many chemical bonds can carbon form with other atoms?
4
Alkanes are hydrocarbons that contain __
single covalent bonds only
When two atoms bond, the positive __ of one atom attracts the negative __ of another
nucleus; electron
When two chlorine atoms bond, they __ a pair of electons
share
A __ bond is formed when atoms share __ of electrons
covalent; pairs
Because polyatomic ions are made of covalently bonded atoms that have either gained or lost electrons, they behave like simple __
ions
A compound consisting of Cr3+ ions and OH- ions would be named __
chromium (III) hydroxide
The chemical formula for the ionic compound consisting of oxide ions and nickel (III) ions is __
Ni2O3
A compound’s __ formula tells you how many atoms of each type are in one molecule
molecular
A __ is a polymer made of bonded amino acids
protein
