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Periodic Table Snigdha B. and Tanaya B. P.A (Solubility Rules (More…
Periodic Table
Snigdha B. and Tanaya B.
P.A
Covalent Bonds
Nonmetal+Nonmetal
Sharing of electrons
If H+F are nonmetals. Shares one electron pair.
Atomic Symbol
Atomic Mass convert moles and grams
Element Titanium
T symbol for Titanium
Mass Number-Protons+Neutrons
Periodic Trends
Electronegativity
Decreases as period increases
Increases as group increases
Fluorine has the highest electronegativity
Atomic Radius
Increases as period increases
engery levels increases=atomic radius increases
Decreases as group increases
Electron Affinity
Increases as Group Increases
How much energy to gain an electron
decreases as period increases
mostly exothermic
Ionization Energy
Increases as group increases
Decreases as period increases
How much energy it requires to remove an electron
Mostly endothermic
PES: A chart that indicates the amount of energy necessary to eject an electron.
Ionic Bonds
Forms ions before bonding.
Transfer of electrons.
Metal+Nonmetal
CaC2, Ca metal, C nonmetal
Dissociate in water, conducts electricity.
Metallic Bonds
Involve a sea of electrons
Metals conduct electricity
Solubility Rules
More soluble ionic compounds conduct electricity better.
Carbonates frequently insoluble.
Hydroxide salts slightly soluble. Transition metals not soluble.
Silver salts insoluble.
Nitrates and Ammonium soluble.
Group 1 elements are soluble.
Salts containing halogens are soluble except with Hg,Pb and Ag.
Chromates,Phosphates, Fluorides, Sulfides of transition metals and insoluble.
Parts of the Table
Halogens
Highly reactive, electronegative
fluorine most electronegative
Gains electron in reactions
7 valence electrons
Ion 1- charge, oxidation state -1.
Groups VIIA/17
Transition Metals
Groups B/3-12
Coulomb's Law
The Amount of energy that an electron has depends on its distance from the nucleus of an atom.
Electron Configuration
The complete description of the energy level and subshell that each electron on an element inhabits.
Sulfur: 1s2,2s2,2p6,3s2,3p4