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chemistry exam study guide
Question | Answer |
---|---|
study of the composition and stucture of the material and the changes that materials undergo best describes the science of | chemistry |
the branch of science that includes the study of materials and process that occur in livings is | biochemistry |
the branch of chemistry that is concerned with the identification and composition of materialsis | analytical chemistry |
the study of substance containing carbon is | organic chemistry |
the branch of chemistry concerned withtheproperties, changes, and relationships betwen energy and matteris | theoretical chemistry |
basic researchis | carried out for the sake of increases knowlege |
a physical property may be investigated by | melting ice |
two features that may distinguish matter are | mass and volume |
an example of an extensive physical property is | mass |
which of the following is an intensive physical property | color |
which of the following obervations is quantitative | the liquid turns blue litmus paper red |
quantitative observation are recorded using | numerical infomation |
qualitative observation are recorded using | non-numerical infomation |
the SI standard unit for length and mass are | meter and kilometer |
the metric unit for length that is closes to the thickness of a dime is the | milimeter |
the symbol for the metric unit used to measure mass is | g |
the unit m3 measures | volume |
the symbol that represents the measure unit for volume | mL |
the SI base unit for time is the | second |
a change in the force of earth's gravity on an object will effect its | weight |
a nuclear partical that has about the same mass as a proton, but with no electricalcharge, is called | neutron |
gamma rays are | elecctromagnetic waves |
phosphorus-33 contains | 18 neutrons |
a nuclear partical that has about the same mass as a proton, but with no electrical charge, is called | neutron |
the smallest unit of an element that can exsit alone or in combination with other such partcals is an | atom |
which of the following forms of radiation has the greates penetrating power | gamma rays |
as the atomic number increases, the number of electrons in an atom | increase |
what does the 101 in 256/101 Md reprsent | the atomic number |
who called an "atom" an atom | democritus |
what is the atomic number of tungsten | 74 |
the distance between to successive peaks on a wave is its | wavelenght |
an element with 8 electrons from its highest main energy level is a | noble gas |
the emission of electrons from metals that have absored photons is called | photoelectric effect |
the region outside the nucleus where an electron can most probably be foud is | electron cloud |
how many quantum numbers are needed to discribe the energy state of an electronin an atom | 4 |
the wave modle of light did not explain | the photoelectric effect |
which group are the noble gas | 18 |
what is the total 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 |
To which group do lithium and potassium belong? | alkali metals |
The discovery of the noble gases changed Mendeleev's periodic table by adding a new | group |
Elements in a group or column in the periodic table can be expected to have similar | properties |
Mendeleev predicted that the spaces in he periodic table represented | undiscovered elements |
Mendeleev attempted to organize the elements based on their | properties |
In the modern periodic table, elements are orderd according to | increasing atomic number |
The most useful source of general information about the elements for anyone associated with chemistry is a | periodic table |
Argon, crypton, and xenon are | noble gases |
ONe-half the distance between the nuclei of identical atoms are bonded together is called the | atomic value |
To which group do flourine and chlorine belong? | Halogens |
The principle that states that the physical and chemical properties of the elemtns are periodic functions of their atomic number is | the peridoic law |
To which group do lithium and potassium belong? | alkali metals |
The discovery of the noble gases changed Mendeleev's periodic table by adding a new | group |
Elements in a group or column in the periodic table can be expected to have similar | properties |
Mendeleev predicted that the spaces in he periodic table represented | undiscovered elements |
Mendeleev attempted to organize the elements based on their | properties |
In the modern periodic table, elements are orderd according to | increasing atomic number |
The most useful source of general information about the elements for anyone associated with chemistry is a | periodic table |
Argon, crypton, and xenon are | noble gases |
ONe-half the distance between the nuclei of identical atoms are bonded together is called the | atomic value |
To which group do flourine and chlorine belong? | Halogens |
The principle that states that the physical and chemical properties of the elemtns are periodic functions of their atomic number is | the peridoic law |
covalent bond results when what is shared | electrons |
most cemical bonds are | partly ionic and partly covalent |
an octet is equal to | 8 |
which of the following is not an example of a molecular formula | B |
if two covalent bonded atoms are identical, the bond | non-polar covalent |
compare with ioniccompounds, molecularcompounds | have lower melting points |
the B--F in BF3 is | ionic |
the chemical bond formed when two atoms share electrons are called | covalent bonds |
atoms are what when they are combined | more stable |
a mutual elecrtical attraction between the nuclei and valence electrons of a different atoms that binds the atoms together is called | chemical bonds |