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Periodic Table and Periodic Properties
Chemical Bonding and Molecular Geometry and Polarity
Nomenclature
The mole and mole calculations / intro to chemical reactions
Chemical Reactiond
100
The tendencies of certain elemental characteristics to increase or decrease as one progresses long a row or column of the table.
What is periodic trends?
100
Mutual electric attraction between the nuclei and valence electrons of different atoms that binds the atoms together. Atoms form chemical bonds because it makes them more stable while individually are unstable and potential energy is lowered.
What is Chemical Bond and why do atoms form it?
100
For a molecular compound, this reveals the number of atoms of each element in a single molecule. For ionic compound, this represents one formula unit - simples ratio for cations and anions.
What is the significance of a chemical formula?
100
The weighted average of the atomic masses of the maturity occurring isotopes of an element.
What is atomic mass?
100
In this process, you need to: 1) identify names of reactans and products and write as word equation i.e. water -> hydrogen + oxygen 2)Formula equation by substituting correct formulas for names of reactants and products. i.e. H2O -> H2 + O2 3)Complete by trial and error. i.e. 2H2O -> 2H2 + O2
What is Balancing Chemical Equations.
200
One half the distance between the nuclei of identical atoms that are bonded together.
What is Atomic Radius?
200
This type of bonding results from the electrical attraction between cations and anions while this other kind of bonding results from the sharing of electron pais between two atoms.
What is the difference between Ionic Bonding and Covalent Bonding.
200
The molecular formula and the definition of empirical formula.
What is experimental formula mass/empirical formula mass. What is the the symbols for the elements combined in a compound, with subscript showing the smallest whole number ratio of the different atoms in the compound.
200
Avogrado´s number and the definition for molar mass. Hint: numerically, it equals to the atomic mass of the element in atomic mass units.
What is 6.022 x 10^23? What is the mass of one mole of a pure substance?
200
1. Deals with the mass relationships of elements in compounds. 2. Incolces the mass relationships between reactants and products in a chemical reaction.
What is stoichiometry? what is reaction stoichiometry?
300
Two answers: The size of an ion is governed not only by its electronic structure but also by its change. The energy required to revolve one electron from a nuclear atom of an element.
What is Ionic Size and Ionization Energy?
300
Two answers: A covalent bond in which the bonding electrons are shared equally by the bonded atoms resulting in a balanced distribution. Meanwhile, this other type of covalent bond has an unequal attraction for the shared electron. Name of the ranges: 0 - 0.3 - 1.7 - 3.3
What is Non Polar Covalent Bond and Polar covalent Bond. 0 - 0.3 non polar 0.3 - 1.7 polar 1.7 - 3.3 ionic
300
Used to indicate the general distribution of electrons anions the bonded atoms in a molecular compound or polyatomic ion.
What is Oxidation Numbers?
300
The definition for the empirical and molecular definitions. Give the formula for one.
For empirical: What is the most simplified form of a molecular formula? mass percent -> grams of each -> moles of each ->empirical formula. For molecular: the actual formula of a molecular compound: molecular weight/empirical formula weight.
300
Definitions for mole ratios and molar mass.
What is a conversion factor that relates the amounts in moles of any 2 substances involved in a chemical reaction. The mass of the significan digits.
400
The energy change that occurs when an electron is acquired by a neutral atom.
What is Electron Affinity?
400
The 3D arrangement of a molecule´s atoms in space. 6 of these molecular shapes:
What is Molecular Geometry? 6 molecular shapes: linear, trigonal planar, tetrahedral, pyramidal, bent, octahedral.
400
A method of balancing the charges between ions in an ionic compound.
What is the criss cross method?
400
The chemical formula´s definition.
What is a combination of chemical symbols and numbers to represent a substance.
400
Definitions for 1)limiting reactant, 2)excess reactant, 3(theoretical yield, 4)actual yield and 5)percentage yield.
What is 1) the reactant that limits the amount of the other reactant that can combine and the amount of product that can form in a c chemical reaction. 2) the substance that is not used up completely in a reaction. 3) the maximum amount of product that can be produced from a given amount of reactant. 4) the measure amount of a product obtained from a reaction. 5)the ratio of the actual yield to the theoretical yield, multiplied by 100.
500
A measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound.
What is Electronegativity?
500
This theory states that the repulsion between sets of valence-level electrons surrounding an atom causes sets to be orientated as far apart as possible. Lone pairs occupy space around the central atom but the shape of the molecules determine only by the positions of the atom.
What is USEPR Theory?
500
The monoatomic, polyatomic and chemical formula for aluminum sulphate.
What is Al , (SO4)2- , Al2SO4.
500
5 types of chemical reactions. An example of synthesis reaction:
What is syntesis, decomposition, single-displacement, double-displacement, and combustion. H2 + O2 = H2O
500
Finding mole ratio
What is amount of given substance (mol) x mole unknown/mole given = amount of unknown substance.