Help
Options
Question
1.) A physical property may be investigated by
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
2.) basic research is
Remaining cards (80)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
mandas chem. exam
chemistry
| Question | Answer |
|---|---|
| 1.) A physical property may be investigated by | melting ice |
| 2.) basic research is | carried out for the sake of increasing knowledge |
| 3.) applied research is | carried out to solve a problem |
| 4.) group _ in the periodic table contains only metals | 2 |
| 5.) an example of an extensive phusical property | color |
| 6.) the most useful ource of chemical information about thwe elements is a | periodic table |
| 7.) under ordinary conditions of temperature and pressure, the particles in a gas are | very far from each other |
| 8.) based on their location in the periodic table oxygen and selenium have | similar proporties |
| 9.) physical means can be used to seperate | mixtures |
| 10.) the state of matter in which a material has netiher a definite shape nor a definite volume is the | gaseous state |
| 11.) which of the following observation is quantitative? | the liquid boils at 100 C |
| 12.) a testable statement used for making predictions and carrying out further experiments is a | hypothesis |
| 13.) the symbol for the metric unit used to measure mass is | grams |
| 14.) the SI base unit for time is the | second |
| 15.) poor precision in scientific measurement may arise from | both human error and the limitations of the measuring instrument |
| 16.) the number of significant figures in the measurement 0.000305 kg is | 3 |
| 17.) the number of significant figures in the measurement 170.040 km is | 6 |
| 18.) standards are chosen because they | are reproducible in another laboratory |
| 19.) the symbol that represents the measured unit for volume is | mL |
| 20.) the metric unit for length that is closest to the thickness of a dime is the | millimeter |
| 21.) to determine density, the quantities that must be measured are | volume and mass |
| 22.) who was the schoolmaster who studied chemistry and proposed an atomic theory | john dalton |
| 23.) the smallest unit of an element that can exist alone or in combination with other such particles is an | atom |
| 24.) what is the atomis number for aluminum | 13 |
| 25.) the discovery of the electron resulted from experiment using | cathrode rays |
| 26.) what does the 218 in polonium-218 represent | the mass number |
| 27.) the half life of an isotope is the time required for half the nuclei in a sample to | undergo radioactive decay |
| 28.) which of the following processes always decreases the number of protons by an even number? | alpha decay |
| 29.) a nuclear particale that has about the same mass as proton, but with no electrical charge, is called a | neutron |
| 30.) for the numbers lass than 0.1, sucha s 0.06, the zeros to the right of the decimal point but before the first nonzero digit | show the decimal place of the first digit |
| 31.) the measurement that has been expressed to four significant figures is | 30.00mm |
| 32.) an element with 8 electrons in its highest main energy level is a | noble gas |
| 33.) the emission of electrons from metals that have absorbed photons is called the | photoelectric effect |
| 34.) the region outside the nucleus where an electron can most probably be found is the | electron cloud |
| 35.) how many quantum numbers are needed to describe the energy state of an electron in an atom | 4 |
| 36.) the wave model of light did not explain | the photoelectrical effect |
| 37.) the atomic sublevel with the next highest energy after 4p is | 5s |
| 38.) because excited hydrogen atoms always produce the same line emission spectrum, scientists concluded that hydrogen | released photons of only certain energies |
| 39.) a quantum of electromagnetic energy is called | photon |
| 40.) the main energy levels of an atom are indicated by the | primcipal quantum numbers |
| 41.) the main energy level that can hold only 2 electrons is the | first |
| 42.) one of the wave properties of electromagnetic radiation, such as light, is | freqency |
| 43.) for the f sublevel, the number of orbitals is | 7 |
| 44.) as it travels throguh s[ace, electromagnetic radiaton | exhibits wavelike behavior |
| 45.) the total number of orbitals that can exist at the second main energy level is | 4 |
| 46.) which of the following processes always decreases the number of protons by an even number? | alpha decay |
| 47.) a nuclear particale that has about the same mass as proton, but with no electrical charge, is called a | neutron |
| for the numbers lass than 0.1, sucha s 0.06, the zeros to the right of the decimal point but before the first nonzero digit | show the decimal place of the first digit |
| 49.) the measurement that has been expressed to four significant figures is | 30.00mm |
| 50.) an element with 8 electrons in its highest main energy level is a | noble gas |
| the emission of electrons from metals that have absorbed photons is called the | photoelectric effect |
| the region outside the nucleus where an electron can most probably be found is the | electron cloud |
| 53.) how many quantum numbers are needed to describe the energy state of an electron in an atom | 4 |
| 54.) the wave model of light did not explain | the photoelectrical effect |
| 55.) the atomic sublevel with the next highest energy after 4p is | 5s |
| because excited hydrogen atoms always produce the same line emission spectrum, scientists concluded that hydrogen | released photons of only certain energies |
| a quantum of electromagnetic energy is called | photon |
| the main energy levels of an atom are indicated by the | primcipal quantum numbers |
| the main energy level that can hold only 2 electrons is the | first |
| one of the wave properties of electromagnetic radiation, such as light, is | freqency |
| for the f sublevel, the number of orbitals is | 7 |
| 62.) as it travels throguh s[ace, electromagnetic radiaton | exhibits wavelike behavior |
| the total number of orbitals that can exist at the second main energy level is | 4 |
| which of the following processes always decreases the number of protons by an even number? | alpha decay |
| 65.) a nuclear particale that has about the same mass as proton, but with no electrical charge, is called a | neutron |
| 66.) for the numbers lass than 0.1, sucha s 0.06, the zeros to the right of the decimal point but before the first nonzero digit | show the decimal place of the first digit |
| the measurement that has been expressed to four significant figures is | 30.00mm |
| an element with 8 electrons in its highest main energy level is a | noble gas |
| 69.) the emission of electrons from metals that have absorbed photons is called the | photoelectric effect |
| 70.) the region outside the nucleus where an electron can most probably be found is the | electron cloud |
| 71.) 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 photoelectrical effect |
| the atomic sublevel with the next highest energy after 4p is | 5s |
| because excited hydrogen atoms always produce the same line emission spectrum, scientists concluded that hydrogen | released photons of only certain energies |
| a quantum of electromagnetic energy is called | photon |
| the main energy levels of an atom are indicated by the | primcipal quantum numbers |
| 77.) the main energy level that can hold only 2 electrons is the | first |
| one of the wave properties of electromagnetic radiation, such as light, is | freqency |
| for the f sublevel, the number of orbitals is | 7 |
| as it travels throguh s[ace, electromagnetic radiaton | exhibits wavelike behavior |
| the total number of orbitals that can exist at the second main energy level is | 4 |
Created by:
amc28
Popular Chemistry sets