Question | Answer |
Basic research is | carried out for the sake of increasing knowledge. |
Chemical properties | include changes that alter the idenity of a substance. |
Two features that distinguish matter are | mass and volume. |
The particles in a solid are | packed closely together |
Physical means can be used to seperate | mixtures |
Technology is | scientific knowledge to solve a problem |
applied reserach is used to | carried out to solve a problem |
study of subtances containing carbon | organic |
a physical property may be investigated by | melting ice |
chemical properties | include changes that alterte idenity of a substance |
Quantitative observations are recorded using | numerical information |
Qualitative observations are recorded using | non-numerical information |
a testable statement used for making predictions and carrying out further experiments is a | hypothesis |
the metric unit for length that is closest to the thickness of a dime is | millimeter |
The symbol for the metric unit used to measure mass is | g |
the symbol that represents the measured unit for volume is | mL |
the SI base unit for time is | second |
the best SI unit for measuring the length of an automobile is the | meter |
how many minutes are in one week? | 10080 |
Who was the schoolmaster who studied chemistry and proposed an atomic theory? | John Dalton |
Who discovered the nucleus by bombarding gold foil with positivly charged particles? | Rutherford |
rutherford's experiments led to the discovery of the | nucleus |
experiments with the cathode rays led to the discovery of the | electron |
organic chemistry is the study of | carbon containing compounds |
the discovery of the electron resulted from experiments using | cathode rays |
all the atoms of the same elements have the same | atomic number |
nickel-60 has | 32 neutrons |
what does the 218 in polonium-218 represent? | the mass number |
a nuclide is identified by | the number of protons in its nucleus |
in SI, the frequency of electromagnetic radiation | hertz |
one of the wave properties of electromagnetic radiation, such as light, is | frequency |
as it travels through space, electromagnetic radiation | exhibits wavelike behavior |
the distance between two succesive peaks ona wave is its | wavelength |
a qunatuam of electromagnetic energy is called a | photon |
the wave model of light did not explain | the photoeletric effect |
Max planck proposed that a hot object radiated energy in small, specific amounts called | quanta |
part of the atom where electrons cannot be found | nucleus |
how many quantum numbers are needed to describe the energy state of an electron in an atom? | 4 |
for the f sublevel, the number of orbitals is | 7 |
the deiscovery of the noble gases changed mendeleev's periodic table by adding a new | group |
What are the elements with atomic numbers from 58-71 in the periodic table called | the lanthanide |
what group do lithium and potassium belong? | alkali metals |
elements ina group or column in the periodic table can be expected to have similar | properties |
mendeleev predicted that the spaces in the table represented | undiscovered elements |
in the modern periodic table, elements are ordered according to | atomic number |
argon, krypton, and xenon are | noble gases |
to which group do fluorine and chlorine belong | halogens |
a horizontal row of blocks in the periodic table is called a | period |
a negative ion is know as a | anion |
The electrons involved in the formation of a chemical bond are called | valance electrons |
atoms whn combined are | more stable |
the chemical bond formed when two atoms share an electron | covalent bond |
if two covalenty bonded atoms are identical, the bond is | nonpolar covalent |
most chemical bonds are | partly ionic and partly covalent |
a covalent bond results when | lewis structures are shared |
a neutral group of atoms held together by covalent bonds is a | molecule |
what is not an example of a molecular formula | B |
an octet is equal to | 8 |
to draw a lewis structure, one must know the | number of valence electrons in each atom |