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