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Semester Exam Review
Questions from the Exam review sheet & answers
| Question | Answer |
|---|---|
| Determine the # of significant digits .008 | 1 |
| Determine the # of significant digits .0080 | 2 |
| Determine the # of significant digits 1.0010 | 5 |
| Which digit is estimated in this measurement .703 | 3 |
| What is the horizontal row of blocks in the periodic table called | Period |
| What do elements in a group have in common | Electron configurations |
| What is a vertical column of elements | Groups |
| What's 3 categories are elements separated into | Metals nonmetals and Metalloids |
| Which type of elements shares both properties of metals and nonmetals | Metalloids |
| Where are the metalloids located in the periodic table lost the metalloids | On the heavy stair step line; B, Si, Ge, As, Sb, Te, At |
| What are the 7base units | Length mass temperature time amount of substance luminous intensity electric current |
| Which of the following observations is quantitative? Brown. Soft 12.00 grams | 12.00 grams |
| Why is liter NOT considered a base unit | Its derived from meters |
| What are the symbols of the 1 base units | Meter: M Kilograms: kg Kelvin: K Second; s Mole: mol Candela: cd Ampere: A |
| Which group of measurements is the most precise | 2 g, 2.5 g, 3 g |
| Write the correct symbol for an atom of boron-10 | 10/5 Boron |
| What is the charge on the nucleus of an atom | Positive |
| What is the mass of an aluminum bar that has the density of 2.70 g/cm3 and a volume of 1.70cm3? | m=4.59 g |
| What nuclear particle has about the same mass as a proton, but with no electrical charge | electron |
| Which part of an atomm has approximately equal 1/2000 of mass of a common hydrogen atom? | electron |
| The nucleus of most atoms is composed of _________ and ________ | Protons, neutrons |
| What makes up most of the volume of the atom? | Electron Cloud |
| What makes up most of the mass of the atom? | Nucleus |
| isotopes of an element contain different numbers of | Neutrons |
| ____________ number = total number of protons and neutron in the nucleus | atomic |
| Write the isotopes symbols for copper-64 and copper-65 | 64/29 Cu 65/29 Cu |
| As the sotmic number increases, the number of electrons | increases |
| What is the mass in amu of carbon-13 isotope | 13 amu |
| An aluminum isotopes consists fo 13 protons, 13 electrons and 15 neutrons. What is the mass number? | 13 |
| Zn-65 has _____ neutrons | 35 |
| An electrically neutral atom of boron has____ protons, _____ electrons, and ____ neutrons | 5, 5, 11, |
| What is the study of the structure and composition of matter and the changes it undergoes | Chemistry |
| What is the volume of a sugar cube that is 2.14 times 10-2m by 8.4 times 10-3m? | 9.4 times 10-7 m3 |
| Which branch of chemistry deals with the study of materials and process that occur in living things | Biology |
| Define matter | Physical an chemical structure, matter is made of atoms |
| What are 2 measurable properties of all samples of matter | solid, liquid |
| List examples of a chemical changes | rusting of iron |
| List examples of physical changes | crushing a can |
| Which type of mixture has more than one phase | heterogeneous |
| what is another name for a homogeneous mixture? Give example | Solution, water, soda |
| Which state of matter is characterized by having an indefinite shape, but a definite volume | Liquid |
| To which group do cesium and francium belong | group 1 |
| To which group to iodine and bromine belong | halogens |
| What period does this element belongs with the following electron configurations [Xe] 6s1 | Cs 55 |
| Which of the following quantum leaps would be associated with the greatest energy of emitted light | n=5 n=1 |
| The first letter of a chemical symbol is always | Capitalized |
| Liquid, Gas, or Solid: Packed closely together | liquid |
| Liquid, Gas, or Solid: very fain motion r apart | gas |
| Liquid, Gas, or Solid: constantly | solid |
| Liquid, Gas, or Solid; able to slide past each other | gas |
| What is a pure substance | Made of only one type of atom or only type of molecule |
| What is the difference between an element and a compound | compounds contains atoms of differ. elements. elements are chemical substance |
| Atoms or Compounds? B-11 | Atoms |
| Atoms or Compounds? Co2 | Compounds |
| Atoms or Compounds? O-18 | Atoms |
| Atoms or Compounds? H-3 | Atoms |
| What element has the electron configuration: 1s2, 2s2, 2p6,3s2, 3p4? | Sulfur |
| What can you infer about the reactivity of group 18? | It is a noble gas |
| What is the smallest particle of an element that retains properties of that element? | Electrons |
| How many protons, neutrons, and electrons are in an atom of barium | 56 protons, 56 neutrons, and 56 ellectrons |
| All forms of electromagnetic radiation travel as the same | speed |
| What element in the third period has the largest radius | Sodium |
| What is an orbital | Electron density formed in an atom or molecule by one or more electrons |
| How is an orbit different from an orbital | Orbit: well defined circular path followed by electrons Orbital: space around the nucleus |
| What are the shapes of s, p, and d, orbital | s: sphere p: dumbbell d: double dumbbell |
| An electron for which n=3 has more_____ than an electron for which n=2 | energy |
| How many orientations in space does the s orbital have? p and d orbital? | s: 1 p: 3 d: 5 |
| What is teh difference between a 2p and 3p orbital | 3p has a higher enegry level |
| How many mm are there in 0.05 | .5mm |
| 1.10 L water is equal to _______ml | 1100 ml |
| If a measurement closely aggres with accepted values it is said to be | accurate |
| If you frequently carry out the same experiment you should have high | precision |
| How many sig figs are there in these: 0.0067g | 2 |
| How many sig figs are there in these: .008 g | 1 |
| How many sig figs are there in these: .0080 g | 2 |
| How many sig figs are there in these: 1.0010 g | 5 |
| How many sig figs are there in these: 10000 m | 5 |
| Express in scientific notation; 0.00007 g | 7 times 10 -5 |
| Express in scientific notation: 7789000 kg | 7.78 times 10-6 |
| Divide 10^8 by 10^-3 | 105 |
| What is the product of 7.76 time 10^24 multiplied by 8.78 times 10^3 | 1.65 times 10 ^ 25 |
| What is the sum of 7.76 time 10^24 and 8.78 times 10^23 | 8.64 times 10^24 |
| What does the grapg look like if the relationship is a direct proportion? | Straight through the oirgin |
| What did Rutherford conclude about atoms from his gold foil experiment. | Atoms are empty space |
| What variable is directly proportional to frequency? | Energy of Photon |
| How are frequency and wavelength related | The higher frequency, shorter the wavelength |
| Determine the energy of a photon having a frequency of 5 time 10^8 Hz. | 3 times 10 ^-25 |
| How many electrons can be occupy the s orbital | 2 |
| What is the electron configuration of Ca | [Ar] 4s2 |
| What is the electron configuration for an atom with 10 electrons | 1s2 2s2 2p6 |
| Meneleev left spaces in his periodic table and predicted several elements and their | properties |
| What is the name of the group of elements from 90-103 and 58-71 called | Actinides elements and Lanthanide series |
| What is the periodic law | Function of atomic # |
| What groups o the f orbital belongs to | f block |
| What is a positive an negative ion called | Positive is called Cation while Negative is called Anions |
| if the spin of one election in an orbital is clockwise, what is the spin of the other electron in that orbital | Counterclockwise |
| How does an electron jump from one energy level to another? | teleporting to level a to level b |
| How is an atom different from an ion | Atoms are neutral containing the same number of protons as electrons. Ions electrically charged particles produced either removing electrons |
| How many unpaired electron does oxygen have | 2 |
| What is the trend of ionization energies down a group | Increase from left to right |
| How does the atomic radius change as you move from left to right across a period | Across a period from left to right radius decreases. Move left to right atoms have more electrons in their outer energy level. |
| What are the rules for addition and subtraction with significant digits | Look at the decimal point. Count the number of significant figures in the decimal portion of each number |
| What are the rules for multiplication and division with significant digits | Least number tells you the significant digits that need to be in your answer |
| What is noble gas notation | shorthand versions of the electron configurations |
| What are the 3 rules for writing electron configurations | Aufbau, Pauli, Hunds are the 3 rules |
| Who was the man who lived from 460 BC-370-BC and was among the first to suggest the idea of atoms | Democritus |
| What unit is used to measure weighted averyage atomic mass | amu |
Created by:
Ambyr Smith-Windley
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