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tannaexamstudyguide
Exam Study Guide
| 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 concerned with the properties, changes, and realtionships between energy and matter is | Physical Chemistry |
| The study of substances containing carbon is | Organic chemistry |
| An example of extensive physical property is | mass |
| The particles in a solid are | packed closely together |
| The state of matter in which a material has a definite volume but no definite shape is | liquid state |
| The most useful source of chemical information about the elements is a | periodic table |
| The elements that border the zigzag line in the periodic table are | metalloids |
| A vertical column of blocks in the periodic table is called | group |
| Elements in a group in the periodic can be expected to have similar | properties |
| Chemistry is the study of? | elements |
| 2.Gamma rays are | electromagnetic waves |
| The smallest unit of an element that can exist alone or in a combination with other such particles is an? | atom |
| Who called the "atom" an atom? | Democritus |
| A nuclide is identified by | the number of protons and neutrons in its nucleus |
| what is the atomic number for tungsten | 74 |
| In a glass tube, electrical current passes from the negative electrode, called the ________ to the other electrode | Cathode |
| Radioactive tracers are used to | follow the movement of substances in a system |
| What scientist discovered electrons? | J.J Thompson |
| Organic Chemistry is the study of? | carbon containing compounds |
| In SI, the frequency of electromagnetic radiation is measured in | Hertz |
| One of the wave properties of electromagnetic radiation, such as light, is | frequency |
| As it travels through space, electromagnetic radiation | exhibits wavelike behavior |
| A quantum of electromagnetic energy is called a(n) | photon |
| The wave model of light did not explain | the photoelectric effect |
| Max Planck proposed that a hot object radiated energy in small, specific amounts called | quanta |
| How many quantum numbers are needed to describe the energy state of an electron in an atom? | four |
| For the f sublevel, the number of orbitals is | seven |
| the total number of orbitals that can exist at the second main energy level is | four |
| how many groups are found on the periodic table? | 18 |
| What are the radioactive elements with atomic numbers 90 to 103 in the periodic table called? | the actinides |
| Which group do lithium and patassium belong? | alkali metals |
| Mendeleev predicted that the spaces in his periodic tabl represented | undiscovered elements |
| Argon, Krypton, and Xenon are | noble gases |
| one-half the distance between the nuclei of identical atoms that are bonded together is called | atomic radius |
| A horizonatal row of blocks in the periodic table is called | period |
| The person whose work led to a periodic table based on increasing atomic number was | Moseley |
| The group of 14 elements in the sixth period that have occupied 4f orbitals is the | lanthanides |
| A positive ion is callled a | cation |
| A negative ion is called a | anion |
| Quantitative observations are recorded using | numerical information |
| A testable statement used for making predictions and carrying out further experiments is a | hypothesis |
| 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 symbol that represents the measured unit for volume is | mL |
| The SI base unit for time is the | second |
| The most appropriate SI unit for measuring the length of an automobile is the | meter |
| A change in the force of Earth's gravity on an object will affect its | weight |
| the number of significant digits in 0.000305 kg is | 3 |
| the number of significant figures in 170.040 is | 6 |
| A mutal electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together is called a(n) | chemical bond |
| Atoms are ________ when they are combined | more stable |
| The chemical bond formed when two atoms share electrons is called a | covalent bond |
| a covalent bond results when _________ are shared | electrons |
| most chemical bonds are | partly ionic and partly covalent |
| a neutral group of atoms held together by covalent bonds is a | molecule |
| An octet is equal to | 8 |
| The elements of the __________ group satisfy the octet rule wothout forming compunds | noble gases |
| How many double bonds are in the Lewis structure of HF? | 0 |
| The electron-sea model of bonding represents | metallic bonding |
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