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Marli&Me
| Question | Answer |
|---|---|
| study of the composition and structure of materials and the changes that materials undergo best describes the science of | chemistry |
| the branch of chemistry that is concerned with the identification and composition of materials is | physical chemistry |
| basic research is | carried out for the sake of increasing knowledge |
| applied research is | carried out to solve problems |
| a physical property may be investigated by | melting ice |
| chemical properties | include changes that alter the identity of a substance |
| a horizontal row of blocks in the periodic table is called a | period |
| the most useful source of chemical information about the elements is | a periodic table |
| elements in a group in the periodic table can be expected to have similar | properties |
| a vertical column of blocks in the periodic table is called a | group |
| which of the following observations is quantitive | liquid boils at 100'C |
| quantitive observations are recorded using | numerical information |
| qualitive observations are recorded using | nonnumerical information |
| a testable statement used for making predictions and carrying out further expiraments is | hypothesis |
| all of the following are examples of units except | weight |
| the symbol for the metric unit used to measure mass is | g |
| the unit m3 measures | volume |
| the symbol that represents the measured unit for volume is | mL |
| the SI base unit for time is the | second |
| a change in the force of gravity on an object will affect its | weight |
| who was the schoolmaster who studied chemistry and proposed an atomic theory | john dalton |
| rutherford fired positivly charged particles at metal foil and concluded that most of the mass of an atom was | concentrated in the nucleus. |
| isotopes of an element contain different numbers of | neutrons |
| the smallest unit of an element that can exist alone or in a combination with other such particles is an | atom |
| the atomic number of oxygen 8 indicates that there are 8 | protons in the nucleus of an oxygen atom |
| all atoms of the same element have the same | atomic number |
| what is the atomic number for aluminum | 13 |
| the half life of an isotope is the time required for half the nuclei in a sample to | undergo radioactive decay |
| which of the following has the greatest penatrating ability | gamma rays |
| gamma rays are | electromagnetic waves |
| an element with 8 electrons in its highest main energy level is | noble gas |
| the emission of electrons from metals that have absorbed protons is called the | photoelectric effect |
| the region outside the nucleus where an electron can most probably be found is the | electron cloud |
| how many quantum numbers are needed to describe the energy state of an electron in an atom | 4 |
| the wave model of light did not explain | the photoelectric effect |
| which group are the noble gases | 18 |
| what is the toal number of electrons needed to fill the first two main energy levels | 10 |
| the atomic sublevel with the next highest energy after 4p is | 5s |
| the number of orbitals for the d sublevel is | 5 |
| max planck proposed that a hot object radiated energy in small amounts called | quanta |
| which group do lithium and potassium belong in | alkali metals |
| elements in a group or colomn in the periodic table can be expected to have similar | properties |
| mendeleev predicted that the spaces in his periodic table represented | undiscovered elements |
| mendeleev attempted to organize the chemical elements based on their | properties |
| in the moderen periodic table elements are ordered according to | increasing atomic number |
| argon krypton and xenon are | noble gases |
| which group do flourine & clorine belong in | halogens |
| a horizontal row of blocks in the periodic table is called a | period |
| the person whose work led to a periodic table based on increasing atomic number was | mosely |
| elements in the d sublevel is being filled have the properties of | metals |
| atoms are when they are combined | more stable |
| when atoms share electrons the electrical attraction of the atom for the electrons is called the atoms | electronegativity |
| if the atoms that share electrons have an unequal attraction for thye electrons the bond is called | polar |
| a covalent bond results when are shared | electrons |
| a mutaul electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together is called | chemical bond |
| in many compounds atoms of main group elements form bonds so that the number of electrons in the outermost energy levels of each atom is | 8 |
| if two covalently bonded atoms are identical the bond is | nonpolar covalent |
| a chemical bond resulting from the electrostatic attraction between positive and negative ions is called | ionic bond |
| the electrons involved in the formation of a chemical bond are called | valence electrons |
| most chemical bonds are | partly ionic partly covalent |
Created by:
marwhee
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