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Chapter IPC18 review
IPC
| The central core of an atom is called the _______. | Nucleus |
| The chart showing the classifications of elements according to their properties and increasing atomic numbers is called the _____. | Periodic table |
| The mass of an _____ is about equal to the mass of a proton. | Neutron |
| Elements arranged in vertical columns in the periodic table are called _____. | Groups |
| The region around the nucleus occupied by the electrons is called the____. | Electron cloud |
| The symbol for chlorine is____. | Cl |
| The maximum number of electrons in the second energy level of an atom is _____. | 8 |
| Two isotopes of carbon are carbon-12 and carbon-14. These isotopes differ from one another by two____. | Neutrons |
| Metals are ____ conductors of heat and electricity. | Good |
| Scientists believe that naturally occurring elements are manufactured within the _____. | Sun and stars |
| So far, scientists have confirmed the existence of _____ different quarks. | 6 |
| In 1926, scientists developed the ______ model of the atom that is in use today. | Electron cloud |
| The sum of the number of protons and neutrons in an atom is the_____. | Mass number/ atomic mass |
| The symbol for _____ is Fe. | Iron |
| A very stable electron arrangement in the outer energy level is characteristic of_____. | Noble gases |
| One proton and one electron are ______ to each element as you go across the periodic table. | Add |
| Electron _____ are used to show how electrons in the outer energy level are bonded when elements combine to form compounds. | Dot diagram |
| The atomic number of an element is determined by its number of _____. | Protons |
| According to present atomic theory, the location of an_____ in an atom cannot be pinpointed exactly. | Electrons |
| Moving from left to right in a row of the periodic table, metallic properties_________. | Reduce |
| Each inner energy level of an atom has a maximum number of ____ it can hold. | Electrons |
| Dot diagrams are used to represent____. | Outer energy electrons/levels |
| Particles of matter that make up protons and neutrons are ____. | Quarks |
| A chemical symbol represents the _____ of an element. | Name |
| Horizontal rows of the periodic table are called____. | Periods |
| Atoms of the same element with different numbers of neutrons are called____. | Isotopes |
| A particle that moves around the nucleus is a(n)____. | Electron |
| Elements that are gases, are brittle, and are poor conductors at room temperature are ______. | Nonmetals |
| A _____ is used to accelerate protons in the study of subatomic particles. | Tevatron |
| A____ is used to accelerate neutrons in the study of subatomic particles. | Cyclotron |
| A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is _____. | 56 |
| Explain why the noble gases are stable. | Their outer energy level is full |
| Compare the masses of protons, electrons, and neutrons. | Protons and neutrons- 1 amu electrons- 0 amu |
| How are isotopes the same and how are they different? | Same number of protons but different number of neutrons for that particular element |
| Explain why the periodic table is such a useful tool. | Can use it to predict how many elements will react |
| Describe where the electrons are in the atom, where they have the least energy, and where they have the most energy. | location in the atom- in the electron cloud around the nucleus least energy- closest to the energy in the cloud most energy- far out in the cloud |
| Chlorine's atomic mass is 35.453. List the two most reasonable isotopes of chlorine. Which one should be more common? | Chlorine 35 and 36 and most common is Chlorine 35 |
| A common radioactive isotope of carbon is carbon-14. How many protons and neutrons does it have? | 6 protons and 8 neutrons |
| Cobalt's atomic mass is 58.9332. What is the most common isotope of cobalt? | 59 |
| What is the name of the symbols of the following elements: F, O, P, and S? | Florine, Oxygen, Phosphorus, and Sulfur |
| What is the atomic number of the following elements: F, O, P, and S? | 9,8,15,16 |
| What is the average atomic mass of the following elements: F, O,P, and S? | 19,16,31,32 |
| What is the period of the following elements: F,O,P, and S? | 2, 2, 3,3 |
| What is the group of the following elements: F,O,P, and S? | 17,16,15,16 |
| What is unusual about the structure of hydrogen-1? | It is the only atom that has 0 neutrons |
| How many groups and how many periods make up the periodic table? | groups- 18 periods- 7 |
| Do the elements Na and K belong to the same period or the same group? | same group |
| Are the elements Na and K metals or nonmetals? | metals |
| Are the properties of the two elements Na and K similar or quite different? | similar because they are in the same group |
| At room temperature, will the elements Na and K be solids, liquids, or gases? | solids |
| Suppose that you have just discovered a new element and have named it neptunite. While studying your new element, you find that it has two isotopes- neptunite-220 and neptunite- 250. What is the average atomic mass of your new element? | 220+250=470 470/2= 235.... neptunite-235 |
| Cont. (Assume that these 2 isotopes are present in equal amounts in nature.) | 220+250=470 470/2= 235.... neptunite-235 |
| Assume that an element is composed of one isotope with a mass of 142 and another isotope with a mass of 145. For each atom with a mass of 142 there are three atoms with a mass of 145. What is the average atomic mass of the element? | 142+145+145+145=577 577/4= 144.25 amu |
Created by:
marykatescamardo
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