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Chemistry Exam
chemistry
| Question | Answer |
|---|---|
| Study of the composition of materials and the changes that materials undergo best describes the science of | chemistry |
| the branch of chemistry that includes the study of materials and processes that occur in living things is | biochemistry |
| the branch of chemistry that is concerned with the indentification and composition of materials is | analytical chemistry |
| the study of chemistry containing carbon is | organic chemistry |
| technology is the | application of scientific knowledge to solve problems |
| applied research | carried out to solve a problem |
| a physical property may be investigated by | melting ice |
| chemical properties | include changes that alter the identity of a substance |
| two features that distinguish matter are | mass and volume |
| the particles in a solid are | packed and close together |
| qualitive observations are recorded using | non-numerical information |
| the si standard units for length and mass are | meter and kilogram |
| the metric unit for length that is closest to the thickness of a dime is the | millimeter |
| the symbol for the metric unit used to measure mass is | g (grams) |
| the unit m to the third measures | volume |
| the symbol that represents the measured unit for volume is | mL |
| the SI unit for time is the | second |
| to calculate the density of an object, | divide its mass by its volume |
| a change in the Earth's gravity will affect its | weight |
| the number of significant figures in the measurement 0.000305 is | 3 |
| isotopes of an element contain different numbers of | neutrons |
| the atomic number of oxygen indicates that there are 8 | protons |
| an aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. its mass number is | 27 |
| what is the atomic number for aluminum | 13 |
| nickel-60 has how many neutrons | 32 |
| phosphorus-33 has how many neutrons | 18 |
| what does the 218 in polonium-218 represent? | the mass number |
| the half life of an isotope is the time required for half the nuclei in a sample to | undergo radioactive decay |
| the total number of protons and neutrons in the nucleus of an atom is its | mass number |
| chlorine-35 has | 17 protons, 17 electrons, and 18 neutrons |
| sulphur-34 contains how many neutrons | 18 |
| The distance between two successive peaks on a wave is its | wavelength |
| an element with 8 electrons in its highest main energy level is a(n) | noble gas |
| the emission of electrons from metals that have absorbed photons is called the | photoelectric effect |
| which group is the noble gases | 18 |
| the atomic sublevel with the next highest after 4p id | 5s |
| max planck proposed that a hot object radiated energy in small, specific amounts called | quanta |
| a quantum of electromagnetic energy is called a(n) | photon |
| for electromagnetic radiation, c is the speed of light quals | frequency times wavelength |
| the main energy levels of an atom are indicated by | principal quantum numbers |
| the main energy that can hold 2 electrons is the | first |
| what is the value of the spped of light | 3.oo x 18 to the 8th |
| the discovery of te noble gases changed Mendeleev's periodic table by adding a new | group |
| what group do lithium and potassium belong to | alkali metals |
| Mendeleev attempted to organize the chemical elements based on their | properties |
| argon, krypton, and xenon are | noble gases |
| what group do fluorine and chlorine belong to | halogens |
Created by:
rob hood
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