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CHEMEXAM1
| Question | Answer |
|---|---|
| The charge on an ion is | either positive or negative. |
| An ion that has a simlar electron configuration to that of neon is | Na+ |
| The pair of ions listed below with similar chemical properties is | F- and Cl- |
| According to the octet rule, a calcium atom has a tendency to | lose two electrons. |
| The correct name for the salt with the formula CaI2 is | calcium iodide. |
| The correct formula for magnesium oxide is | MgO. |
| The only property listed that is not characteristic of ionic compounds is | lack of crystal structure. |
| The only formula listed below that represents a polyatomic ion is | HCO3- |
| The correct name for the compound with the formula CaSO4 is | calcium sulfate. |
| Ionic bonding always takes place between | ions of opposite electrical charge. |
| All elements in Group 2 of the periodic table have outermost energy levels with the electron configuration ns2, where n= 1,2,3, and so on. Explain how atoms with this electron configuration achieve a stable octet. | All Group 2 elements lose 2 electrons to create a stable octet of outermost valence shell (form +2 cation). |
| Name the compound: MgS | Magnesium sulfide |
| Name the compound: BaBr2 | Barium bromide |
| Name the compound: NaBr | Sodium bromide |
| Name the compound: AlF3 | Aluminum fluoride |
| T/F: All lab measurements are certain. | False |
| T/F: The metric system uses measure of ten to express large or small numbers and is used by the scientific community. | True |
| T/F: Temperature is a measure of how hot or cold something is. | True |
| T/F: One calorie is the amount of heat that raises the temperate of one gram of water by one degree centigrade. | True |
| T/F: The SI temperature scale is called the Kelvin scale. | True |
| The metric measure best suited to measure distance b/t Jackson, MS and Memphis, TN would be | kilometer. |
| How many significant digits are in the measurement 5.0070 g? | five |
| IN the measurement 43.52 centimeter which digit is the most uncertain? | 2 |
| the number of significant figures in the measurement 6.80m is? | 3 |
| The number 210,000 has how many significant figures? | 2 |
| anything that has mass and volume | mass |
| ______ is the capacity to do work or produce heat. | Energy |
| theoretically lowest temperature that can be reached | absolute zero |
| substances that can't be changed into simpler substances by a chemical change | elements |
| substances that contain two or more elements in a fixed proportion | compounds |
| _______ is used to write very large or very small numbers. | Scientific notation |
| If D= m/v; what is the density (D) of an unknown element that has a mass (m) of 10g and a volume (v) of 50 cm3. | 0.2 g/cm3 |
| If 1 calorie- 4.184 joules (J) then 10 calories= how many joules? | 41.84 joules |
| Write in correct scientific notion the number 503,000,000. | 5.03 X 10 to the 8 |
| A baby has a fever, his temperature is 40 degrees centigrade/celsius. What is his temperature in the Kelvin scale? | 313 K |
| Potassium | K |
| Silicon | Si |
| Tungsten | W |
| Tin | Sn |
| Sodium | Na |
| Ar | Argon |
| Pt | Platinum |
| Ne | Neon |
| Zn | Zinc |
| Mg | Magnesium |
| T/F: There are seven rows across the periodic table. | True |
| Compounds that have the same number of positive and negative charges are said to be | electrically neutral. |
| An ion of bromine with a single negative charge has the symbol and the name | Br-, bromide ion. |
| The electrostatic attraction between _______ forms an ionic bond. | ions |
| The following are characteristics of most ionic compounds: | have high melting points, bonds are stronger than covalent bonds, can conduct electricity in a liquid, soluble in water------ (a),(b),(c), and (d) |
| The correct formula for potassium bromide is | KBr. |
| An _____ bond forms when a cation transfers its extra electron to an anion who needs it. | ionic |
| Ions of opposite charge _____ each other easily, so they form a specific pattern called a crystal lattice. | attract |
| Cu, Ag, and Au | d block elements |
| Half the distance between 2 atomic nuclei | atomic radii |
| Reflects the attraction for elements in a chemical bond | electronegativity |
| Energy needed to remove 1 electron from valence shell | Ionization energy |
| Li, Na, and K | s block elements |
| Exist in 3 states at room temperature | Halogen family elements |
| All have 8 valence electrons | Noble gas family elements |
| The Periodic Law states that when elements are arranged in order of increasing atomic _________ their properties show a periodic pattern. | number |
| Elements in a group have valence electrons that are _______. | the same |
| Nonmetals are located in the ______ of the periodic table. | upper right |
| The noble gases have ______ valence electrons. | eight |
| The halogen family elements have ______ valence electrons so are highly electronegative. | seven |
| The alkali metal group elements are most likely to ionize as _______. | cations |
| The inner transition elements include the _______ d-block elements. |
Created by:
kirby.smith