Category 1
All the atoms in a substance have the same identity
What is an element?
digits that carry meaning contributing to its measurement resolution.
What are significant digits
Atoms of the same element that have different numbers of neutrons.
what is isotopes
a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons.
what is atomic radii
the total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom.
what is oxidation number
covalent, ionic, metallic, and hydro bonds
what are bonding types
explains the behavior of a hypothetical ideal gas.
what is kinetic theory
Number of protons in an atom is equal to a number called {blank}.
What is an atomic number?
analysis using the fact that physical quantities added to or equated with each other must be expressed in terms of the same fundamental quantities for inferences to be made about the relations between them.
What is dimensional analysis
the time required for a quantity to reduce to half its initial value.
What is half life
a measure of the tendency of an atom to attract a bonding pair of electrons.
what is electronegativity
a property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed:
what is chemical properties
number of units in one mole of any substance
What is Avogadros principle
a system of physical units ( SI units ) based on the meter, kilogram, second, ampere, kelvin, candela, and mole, together with a set of prefixes to indicate multiplication or division by a power of ten.
What is an SI unit
A graphing calculator is a handheld computer that is capable of plotting graphs, solving simultaneous equations,
what is a graphing calculators
he process by which an unstable atomic nucleus loses energy by emitting radiation,
what is radio active decay
describes the decrease in attraction between an electron and the nucleus in any atom with more than one electron shell.
what is shielding effect
can be observed or measured without changing the composition of matter. used to observe and describe matter.
what is physical properties
a section of chemistry that involves using relationships between reactants and/or products in achemical reaction to determine desired quantitative data
what is stoichiometry
a way of expressing numbers that are too big or too small to be conveniently written in decimal form.
What is a scientific notation?
a learning tool that connects probes and sensors to a computer running suitable software and allows students to view real-time data in a variety of formats.
what is probeware
a particle smaller than an atom
what are subatomic particles
the energy required to remove an electron from a gaseous atom or ion.
what is ionization energy
uses complex shapes of orbitals (sometimes called electron clouds), volumes of space in which there is likely to be an electron. ..
what are quantum models
expresses the quantitative relationship between reactants and products in a chemical equation.
what is stoichiometry relationships
an equation between two variables that gives a straight line when plotted on a graph.
What is linear equations?
This number is the sum of the number of protons and neutrons.
what is mass number
a column of elements in the periodic table of the chemical elements
What are groups
the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.
what is electron configuration
a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers,
what is chemical formula
classifies a substance as an acid if it acts as an electron-pair acceptor and as a base if it acts as an electron-pair donor.
what is acid base theory
A proportion is an equation with a ratio on each side. It is a statement that two ratios are equal. ... When one of the four numbers in a proportion is unknown,
What is ratio and proportion
Is the weighted average mass of its isotopes.
what is the average atomic mass
row of chemical elements. All elements in a row have the same number of electron shells.
what is periods
an outer shell electron that is associated with an atom,
what is valence electrons
an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge are the same for both the reactants and the products.
what is balancing equations
any process by which electrically neutral atoms or molecules are converted to electrically charged atoms or molecules
what is ionization