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Exam #1
For review
| Question | Answer |
|---|---|
| Best current explanation to an observation which has been well tested experimentally is called: A. hypothesis B. law C. model D. theory E. accident | D. theory |
| State of matter which has definite shape and definite volume. A. liquid B. solid C. gas | B. solid |
| The charge on an electron is A. positive B. neutral C. negative | C. negative |
| How close a measured value is to the actual value is called A. accuracy B. equality C. precision D. conversion factor E. estimation | A. accuracy |
| Atoms of which the following elements have a nucleus with 24 protons: A. copper B. carbon C. chlorine D. chromium E. cerium | D. chromium |
| Escape of molecules from the surface of a liquid to the vapor state is called: A. evaporation B. boiling C sublimation D. condensation | A. evaporation (sublimation is when a solid goes directly from a solid to a gas without it going through the liquid phase) |
| Anything that has mass and occupies space: A. matter B. compound C. element D. mixture | A. matter |
| Heat is a form of energy, which unit(s) is/are appropriate reporting amount/quantity of heat? A. *C B. K C. calories D. both A & B E. cal/(g*C) | C. calories |
| Numbers obtained from measurements which require estimations are: A. exact numbers B. measured numbers | B. measured numbers |
| The standard metric unit for length measurements is the: A. meter B. liter C. gram | A. meter |
| Type of emission when an unstable nucleus converts a neutron to a proton and emits an electron from the nucleus: A. positron B. beta C. gamma D. alpha | B. beta |
| The length of time for half of a radioactive sample to decay: A. curie B. rem C. radioactivity D. half-life | D. half-life |
| Which of the following types of nuclear radiation travels the greatest distance through air or material? A. Beta B. alpha C. gamma | C. gamma |
| How many significant figures/digits in the measurement 63.40 g? A. two B. three C. four D. zero | C. four |
| Which one of these elements is an alkali metal? A. silicon B. strontium C. sulfur D. sodium E. silver | D. sodium |
| Which one of these elements is a halogen? A. bismuth B. bromine C. beryllium D. boron E. barium | B. bromine |
| Selenium-75 is used in pancreas scans. How many neutrons are in an isotope of selenium-75? A. 61 B. 109 C. 75 D. 34 E. 41 | E. 41 (75 - 34 atomic # = 41 neutrons) |
| Shape, color, state of matter, melting point and density are of a substance? A. chemical properties B. physical changes C. physical properties D. chemical changes | C. physical properties |
| Type of emission when high energy is emitted from the nucleus of a radioactive isotope with no change in mass number or atomic number is called: A. positron B. gamma C. alpha D. beta | B. gamma |
| Elements which are usually shiny solids and are good conductors of heat or electricity are called: A. metals B. metalloids C. nonmetals | A. metals |
| Which one of these elements is a semi-metal/metalloid? A. argon B silver C. americium D. gold E. arsenic | E. arsenic |
| Which one of the following represents the measure of biological effect or biological damage done by different kinds of radiation? A. rad B. rem C. half-life D. activity | B. rem |
| Kinetic energy is: A. energy of motion B. stored energy | A. energy of motion |
| Gold has the density of 19.3g/mL. What is the volume of a pure gold ring having a mass of 12.4g? | D=M/V 12.4/19.3 = 0.642mL |
| The USDA recommends 18 mg daily of iron for females. How many ounces of iron would this be if 1 oz. = 28.3 g? | 18 mg x 1/1000 mg x 18/28.3 = 18/28300 = 0.00064 oz. |
| A doctor requests 325 mg of antibiotic. The supply on hand is 250 mg antibiotic / 5.0 mL of solution. How many mL of medication is required? | 325 mg x 5.0mL/250mg = 1625/250 = 6.5 mL |
| Express 2.3 L in deciliters | 2.3L x 10 dL/1L = 23 dL |
| Ne | Neon |
| Ga | Gallium |
| Sn | Tin |
| Xe | Xenon |
| Ni | Nickel |
| Hg | Mercury |
| He | Helium |
| Li | Lithium |
| Rn | Radon |
| O | Oxygen |
| Potassium | K |
| calcium | Ca |
| Krypton | Kr |
| zinc | Zn |
| zirconium | Zr |
| antimony | Sb |
| fluorine | F |
| radium | Ra |
| cobalt | Co |
| tungsten | W |
| platinum | Pt |
| selenium | Se |
| titanium | Ti |
| americium | Am |
| phosphorus | P |
| copper | Cu |
| magnesium | Mg |
| nitrogen | N |
| plutonium | Pu |
| tellurium | Te |
| (Use periodic table) Atomic # for Aluminum | 13 |
| (Use periodic table) Atomic # for Tungsten | 74 |
| (Use periodic table) Atomic # Chromium | 24 |
| Write the isotope # for Manganese-55 | 55/25 Mn |
| How many protons in an atom of molybdenum? | 42 |
| How many electrons in an atom of vanadium | 23 |
| How many neutrons in an isotope of palladium with a mass number of 109? | 109 - atomic #46 = 63 neutrons |
| What is the mass number for iodine with 70 neutrons? | 70 neutrons + atomic # 53 = mass # of 123 |
Created by:
daydreamer67