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WattsChem
Exam Study Guide
| Question | Answer |
|---|---|
| What are the branches of chemistry? | Organic, Inorganic, Physical, Analytical, Biochemistry, Theoretical |
| What is a chemical? | Any substance that has a definite composition |
| What is chemistry? | The study of the composition, structure, and properties of matter, the processes that matter undergoes, and the energy changes that accompany these processes |
| A horizontal row of blocks in the periodic table is called | Peroid |
| An example of a extensive phtsical property is | Mass |
| The elements that border the zigzag line in the perodic table are | metalloids |
| Chemical properties are | changes that alter the identity of a substance |
| The branch of chemistry concerned with the properties, changes, and relationships between energy and matter is | Physical chemistry |
| Applied research is | carried out to solve a problem |
| Basic research is | carried out for the sake of increasing knowledge |
| Quantitative observations are recorded using | numerical information |
| Qualitative observations are recorded using | non-numerical information |
| A testable statemet used for making predictions and carrying out futher experiments is a | hypothesis |
| Standards are chosen because they | are reproducable in another laboratory |
| The SI standard units for length and mass are | meter and kilogram |
| The symbol for the metric unit used to measure mass is | g |
| The unit m3(superscript 3) measures | Volume |
| The symbol that represents the measured unit for volume is | mL |
| The SI base unit for time is the | second |
| To calculate the density of an object | divide its mass by its volume |
| Gamma rays are begin | electromagnetic waves |
| A neuclear particle that has about the same mass as a proton, but with no electrical charge is called a | Neutron |
| The forces that hold the particals in the neucleus together are called | nuclear forces |
| The discovery of the electron resulted from experiments using | cathode rays |
| Which instrument detect radition by counting electric pulses carried by ionized gas atoms | Geiger-Muller counters |
| What does the 218 in Polonium-218 represent | the mass number |
| which rays have the most penetrating power | Gamma Rays |
| reactions that affect the neucleus of an atom are called | neuclear reactions |
| who was the schoolmaster who studied chemistry and proposed an atomic theory | john dalton |
| isotopes of an element contain different numbers of | neutrons |
| the distance between two successive peaks on a wave is its | wavelength |
| a quantum of electromagnetis energy is called a | photon |
| as it travels through space, electromagnetic radiation | exhibits wavelike behavior |
| one of the wave properties of electromagnetic radition, such as light, is | frequency |
| in SI the frequency of electromagnetic radiation is measured in | hertz |
| how many quantum numbers are needed to describe the energy state of an electron in an atom | 4 |
| the number of orbitals for the d sublevel is | 5 |
| for the f sublevel the number of orbitals is | 7 |
| what is the total number of electrons needed to fill the first 2 main energy levels | 10 |
| how many electrons can occupy the s orbitals at each energy level | two, if they have opposite spins |
| in the modern perodic table, elements are ordered according to | increasing atomic number |
| the discovery of the Nobel Gases changed Mendeleev's by adding a new | group |
| to which group do fluorine and chlorine belong | halogens |
| Argon, Krypton, and Xenon are | Nobel Gases |
| a positative ion is known as a | cation |
| a negative ion is known as a | anion |
| valence electrons are the electrons in the | in the highest energy level |
| the number of valence electrons in group 17 is | 7 |
| the number of valence electrons in group 1 elements is | 1 |
| the number of valence electrons in group 2 elements are | 2 |
| a covalent bond results when _______ are shared | electrons |
| most chemical bonds are | partly ionic and partly covalent |
| an octet is equal to | 8 |
| Malleability and ductility are characteristiss of substances with | metalic bonds |
| the electron-sea model of bonding represents | metallic bonding |
| an example of a molecular formula is | NH3 |
| the chemical bond formed when 2 atoms share electrons is called | covalent bond |
| the electrons involved in the formation of a chemical bond are called | valence electrons |
| an example of a formula unit is | NaCl |
| a compound that vaporizes readily at room tempature is most likely to be a | molecular compound |
Created by:
swatts
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