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PBHS Chemistry I

Chapter 7 Ionic bonds & Compounds

QuestionAnswer
elements found in groups 1A-7A are called ___________ representative elements
_______________ are the electrons found in the highest occupied energy level of an atom valence electrons
The ________ of valence electrons determines the chemical properties of the element number
To find the number of valence electrons in an atom, simply look at its ________________ group number
the elements in group 1A have ___ valence electron(s) one
the elements in group 2A have ___ valence electron(s) two
the elements in group 3A have ___ valence electron(s) three
the elements in group 4A have ___ valence electron(s) four
the elements in group 5A have ___ valence electron(s) five
the elements in group 6A have ___ valence electron(s) six
the elements in group 7A have ___ valence electron(s) seven
the elements in group 8A have ___ valence electron(s) eight
Valence electrons are usually the only electrons used in _____________ chemical bonds
Electron dot structures (sometimes called ___________ Structures) Lewis Dot
Electron dot structures are diagrams that show the valence electrons represented by ______ arranged around the chemical symbol dots
_______, such as neon and argon, are unreactive… that is they are stable noble gases
In 1916, Gilbert Lewis used the idea that noble gases were unreactive to come up with the ___________ octet rule
In forming compounds, elements tend to want to achieve the electron configuration of a noble gas which has ________ electrons in its outer electron shell eight
Recall that each noble gas has eight electrons in its highest energy level and a general electron configuration of _________ ns2 np6
Atoms of metallic elements tend to ___________ their electrons to get to the stable configuration of ns2 np6 lose
Atoms of some non-metallic elements tend to ________ (ionic bond) or _______ (covalent bond) electrons to achieve an octet gain or share
An atom starts ____________ because it has the same number of positive protons and negative electrons electrically neutral
An atoms loss of valence electrons produces a ________ or a positively charged ion cation
the gain of a negatively charged electron by a neutral atom produces an ___________ anion
using a periodic table, p. 162 in your text, you can find that Beryllium (Be) has ____ valence electrons and most likely will have a _____ charge two, +2
using a periodic table, p. 162 in your text, you can find that Sulfur (S) has ____ valence electrons and most likely will have a _____ charge six, -2
Naming of ions Cations: use the ________ name of the element unchanged
Naming of ions Anions: change the ending of the element name to _______ -ide
Mixtures of two or more elements, one of which is a metal alloy
common alloy mixing copper and tin bronze
common alloy mixing iron and chromium stainless steel
Metallic Bonds The valence electrons of a metal can be modeled as a _______… they are mobile and can drift freely from one part of the metal to another sea of electrons
Metals are _________: they can be drawn into wires ductile
Metals are ____________: able to be hammered or forced into shapes malleable
The ___________ of an ion is the number of ions of opposite charge that surround an ion in a crystal coordination number
Most ionic compounds are _____________ at room temperature crystalline solids
Ionic compounds generally have ___________ melting points high
Ionic compounds can conduct an ____________ when melted or dissolved in water electric current
Lead(II) iodide (PbI2) or plumbous iodide is a _____________ at room temperature yellow solid
Lead(II) iodide (PbI2) or ____________ is a bright yellow solid at room temperature plumbous iodide
_______________ or plumbous iodide is a bright yellow solid at room temperature Lead(II) iodide (PbI2)
Lead iodide is _________ due to its lead content. toxic
In the nineteenth century Lead iodide was used as an artists' __________ under the name Iodine Yellow pigment or paint
Lead iodide can be obtained as a yellow precipitate by reacting solutions of ___________ and sodium iodide lead(II) nitrate
Lead iodide can be obtained as a yellow precipitate by reacting solutions of lead(II) nitrate and _________________ sodium iodide
Lead iodide can be obtained as a ____________ by reacting solutions of lead(II) nitrate and sodium iodide yellow precipitate
_____________ can be obtained as a yellow precipitate by reacting solutions of lead(II) nitrate and sodium iodide lead iodide
Pb(NO3)2 (aq) + 2NaI (aq) → PbI2 (s) + 2NaNO3 (aq) is the ______________ for the reaction in our lab chemical equation
in chemical formulas, always write the ___________ first cation
in chemical formulas, the ___________ goes after the ion it affects and tells how many of that ion is in that compound and only goes on the chemical formula (not the name) subscript
A ______________ is the lowest whole-number ratio of ions in an ionic compound formula unit
Anions and cations have ____________ charges and attract each other by means of electrostatic forces opposite
Anions and cations have opposite charges and attract each other by means of ________________ forces electrostatic
electrostatic forces are called ______________ ionic bonds
sodium (Na) has ________ valence electron and has a ________ charge; chlorine has _____ valence electrons and has a ______ charge; they form a compound with the formula _________ 1, +1, 7, -1 NaCl
NaCl is called _____________ Sodium Chloride
polyatomic ions are ions act as a single _______ with a charge over the whole ion unit
SO4 is an example of a _____________ ion and has a charge of _____ polyatomic, -2
SO4 is called _____________ sulfate
NH4 is called _______________ and has a charge of _______ ammonium, +1
the carbonate ion has a chemical formula of ________ and a charge of _______ CO3, -2
Al+3 + 3Br-1 forms ___________ AlBr3
Mg+2 ionically bonds with Cl-1 and forms a compound called ___________________ magnesium chloride
: Mg+2 ionically bonds with Cl-1 and forms a compound called Magnesium Chloride; the formula unit ratio Magnesium to Chloride is 1:2, so the chemical formula is written __________ MgCl2
: Mg+2 ionically bonds with Cl-1 and forms a compound called Magnesium Chloride; the formula unit ratio Magnesium to Chloride is _________ so the chemical formula is written MgCl2 1:2
Ionic compounds are electrically __________(the plusses and the minuses equal out) neutral
more polyatomic fun: write the formula and charge for the hydroxide ion OH, -1
more polyatomic fun: write the formula and charge for the nitrate ion NO3, -1
write the compound name for Pb(NO3)2 lead (II) nitrate
write the compound name for NH4OH ammonium hydroxide
write the chemical formula for lead iodide PbI2
write the chemical formula for Iron(II)Oxide , Iron (III) Oxide FeO, Fe2O3
Created by: kcshiker