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Braun Chemistry #1
| Question | Answer |
|---|---|
| Aluminum | Al |
| Argon | Ar |
| Arsenic | AS |
| Barium | Ba |
| Bromine | Br |
| Cadmium | Cd |
| Calcium | Ca |
| Carbon | C |
| Cesium | Cs |
| Chlorine | Cl |
| Chromium | Cr |
| Cobalt | Co |
| Copper | Cu |
| Fluorine | F |
| Gold | Au |
| Helium | He |
| Hydrogen | H |
| Iodine | I |
| Iron | Fe |
| Lead | Pb |
| Lithium | Li |
| Magnesium | Mg |
| Manganese | Mn |
| Mercury | Hg |
| Neon | Ne |
| Nickel | Ni |
| Nitrogen | N |
| Oxygen | O |
| Phosphorus | P |
| Potassium | K |
| Silicon | Si |
| Silver | Ag |
| Sodium | Na |
| Strontium | Sr |
| Sulfer | S |
| Tin | Sn |
| Zinc | Zn |
| atom | the limit of chemical subdivision for matter |
| basic unit of measurement | a specific unit from wwhich other units for the same quantity are obtained by mulitplication or division |
| chemical changes | canges matter undergoes that involve changes in composition |
| chemical properties | properties mater demonstrates when attempts are made tp chane it into new substances |
| compound | pure substances consisting of two or more kinds of atoms in the form of heteroatomic molecules or individual atoms |
| density | the number given when the mass of a smaple of a substance in divided by the volume of the same sample |
| What are the proper units of measurement for density? | ? |
| derived unit of measurement | a unit obtained by the dividion or mulitplication of one or more basic units |
| diatomic molecules | molecules that contain one atom |
| element | a pure substance consisting of only one kind of atom in the form of homoatomic molecules or individual atoms |
| exact numbers | numbers that have no uncertainty |
| factors unsed in the factor-unit method | fractions obtained from numerical relationships between quantities |
| heteroatomic molecules | molecules that contain two or more kind of atoms |
| hetergeneous matter | matter ith properties that are not the same throughout the sample |
| homoatomic molecules | molecules that contain only one kind of atom |
| homogeneous matter | matter that has the same properties throughout the sample |
| mass | a measurement of the amount of matter in an object |
| matter | anything that has mass and occupies space |
| mixture | a physical blend of matter that can theoretically be physically separated into two or more components |
| molecule | the smallest particale of a pure substance and is capable of a stable independent existance. |
| What is the limit of physical subdivision for a pure substance? | a molecule |
| physical changes | changes matter undergoes without changing composition |
| physical properties | properties of matter that can be observed or measured without trying to change the composition of the matter being studied |
| polyatomic molecules | molecules that contain more that three atoms |
| pure substance | matter that has a constant composition and fixed properties |
| scientific models | eplainations for observed behavior in nature |
| scentific notation | a way of representing numbers consisting of a product between a nonexponential number and 10 raised to a whole number exponent that may be positive or negative |
| signficant figures | the numbers in a measurement that represent the certainty of the measurement, plus one number representing an estimate. |
| solutions | homogeneous mixtures of two or more pure substances |
| What state of matter are solutions almost always found in? | liquid |
| standard position for a decimal | in scentific notation, the position to the right of the first nondigit in the nonexponential number |
| triatomic molecules | molecules that contain three atoms |
| weight | a measurement of the gravitational force acting on an object |
| elemental symbol | a symbol assigned to an element based on the name of the element, consisting of one capital letter or one capital letter followed by a lowercase letter |
| compound formula | a representation of the molecule of a compound, consisting of the symbols of the atoms found in the molecules |
| nucleus | the central core of atoms that contains protons, neutrons, and most of the mass of atoms |
| mass number of an atom | a number equal to the sum of protons and neutrons in the nucleus of an atom. |
| What is the symbolic representation of the mass number of an atom? | A |
| isotopes | atoms that have the same atomic number but different mass numbers. THAT IS, they are atoms of the same element that contain different numbers of neutrons in their nuclei. |
| atomic mass unit (u) | a unit used to express the relative masses of atoms. |
| What is a u equal to? | one u is equal to 1/12 the mass of an atom od carbon-12. |
| atomic weight | the mass of an average atom of an element expressed in atomic mass units |
| molecular weight | the relative mass of a molecule expressed in atomic mass units and ccalculated by adding together the atomic weights of the atoms in the molecule |
| mole | the number of particules (atoms or molecules) contained in a sample of element or compound with a mass in grams equal to the atomic or molecular weight, respectively. |
| What is one mole equal to numerically? | 6.02 x 10^23 |
Created by:
tanderson19
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