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AaronK
Chemistry Exam
| Question | Answer |
|---|---|
| the branch of chemistry that includes the study of materials and processes that occur in living thigs | biochemistry |
| applied research is | carried out for the sake of gaining knowledge |
| a physical property may be investigated by | melting ice |
| 2 features that distinguish matter is | mass and volume |
| an example of extensive physical property is | mass |
| a physical change occurs when | glue gun melts glue |
| Group___ in the periodic table contains only metal | 2 |
| physical means can be used to seperate | mixtures |
| the particles in a solid are | tightly packed |
| what is not a property of metals | unreactivity |
| what is an example of observations in quantative | liquid boils at 100 celsius |
| quantative observations are recorded using what | non-numerical information |
| standards are chosen because they | have units that can be converted into other units |
| symbol for metric unit | g |
| m to the third power measures | volume |
| symbol for for volume is | mL |
| SI base unit for time is | seconds |
| a change in the earth's gravity on an object will affect its | weigh |
| what is an example of units | weight |
| how many minutes are in one week | 10080 |
| schoolmaster who proposed the atomic theory | John Dalton |
| what is the study of chemicals and how they work | chemistry |
| smallest element that can be alone | atom |
| organic chemistry | study of carbon containing compounds |
| discovery of the electron resulted from experiments using | cathode rays |
| atomic number for aluminum | 13 |
| Phosphorus-33 contains | 18 neutrons |
| reactions that affect the nucleous of an atom are called | nuclear reactions |
| who called the atom an atom | Democritus |
| what unit measures radiation | rem |
| for electromagnetic radiation, speed of light equlas | frequency times wavelength |
| SI unit of measure for electromagnetic radiation | hertz |
| wave property of electro. radiation | frequency |
| part of the atom where the electrons cant be found | nucleus |
| number of orbitals for sublevel d | 5 |
| number of orbitals for sublevel f | 7 |
| how many orbitals can exist in the second main energy level | 4 |
| what group is the noble gases | 18 |
| how many groups are in the periodic table | 18 |
| how many periods are on the periodic table | 7 |
| what group does lithium and potassium belong to | alkali metals |
| Mendeleev predicted that the spaces in his periodic table represented | undiscoverd elements |
| Mendeleev attempted to organize the chemical elements based on their | properties |
| modern periodic tables are based on | increasing atomic number |
| Argon,Krypton, and xeneon are | noble gases |
| fluorine and chlorine belong to | halogens |
| horizontal rows on the periodic table | periods |
| number of valence electrons for group 17 | 7 |
| how many protons des Antimony have | 51 |
| elements in group 1 | alkali metals |
| electrons involved in the formation of a chemical bond | valence electrons |
| Atoms are ___ when they are combined | more stable |
| a covalent bond results when____ are shared | electrons |
| most chemical bonds are | partly ionic and partly covalent |
| a neutral group of atoms held together by a covalent bond is a | molecule |
| an octet is equal to | NO |
| what is not a property of an ionic compound | low boiling point |
| characteristic of metallic bonds | malleable and ductible |
| the elements of the____ group satisfy the octet rule | noble gas |
| how many double bonds are in the Lewis structure for Hydrogen Fuoride | one |
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