NOTES
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 periodic table is arranged like a | calendar
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| A calendar organizes | days, weeks,and months
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| Common days are together in a | column
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| What is a quark? | sub-sub atomic particle
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| One week is together in a | row
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| In a periodic table, the column is called a | group or family
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| Each group or family shares | common characteristics
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| Each row is called a | period
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| The elements have a variety of properties- one is | chemical activity
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| Some elements are very active or reactive- What does this mean? | They combine easily with other elements
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| Some elements are not reactive- What does this mean? | They cannot react with other elements
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| The elements in the right column are called | The Noble Gases
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| What do the Noble Gases do? | They never combine with any other elements
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| When did Dmitri Mendeleev observe the properties of elements and record what? (date and what he recorded) | 1869 and chemical and physical properties
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| Mendeleev found that some elements had ______ characteristics | the same
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| These two elements irritate the eyes. | Cl and Fl
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| These to metals are shiny( but tarnish easily) | Ag and Cu
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| dulling appearance of a shiny metal when it oxidizes | tarnish
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| Metals which oxidize easily are | silver, brass, bronze, copper, and iron
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| Mendeleev recorded ________ and________. | atomic mass and bonding power
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| Atomic mass means | the density of an atom
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| The Atomic mass is based on | hydrogen which is the lightest element
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| Atomic mass unit is the unit used to measure atoms based on ___________ which has the AMU of __ | Hydrogen; 1
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| Bonding power (which means____)is based on____. | reactivity; the number of chemical compounds an element can form
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| __________ saw the atom as a solid sphere. | Dalton
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| _________ saw the electrons but saw them attached to a solid sphere, but he knew about the______ AND ________ ________ | Thompson; positive and negative charges
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| ____________ saw a center and called it a nucleus and saw the movement and orbiting of an atom. | Rutherford
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| ____________ saw the protons and neutrons in the center. The electron cloud is caused by movement of the atom. The electron movement causes heat and heat is energy. | Bohr
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| The nucleus is the ______. | core
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| The core contains ____________ ( ) and ___________ ( ) | protons; + ; neutrons ; -;
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| A proton has __________ times the mass of an electron. | 2000
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| Most of the mass of an atom is ___ | inside the nucleus
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| __________ gives atoms a charge. | protons and electrons
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| What is the atomic number? | number of protons in the nucleus; every element has a different number of protons, so periodic table is listed by the atomic number
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| Electrons are not included in the ________ or _____ | mass or number
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| Electrons are not part of the nucleus so... | not part of the mass's number
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| Electrons can be __________, _______, or ________ | lost, shared, or transfered
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| There are over ____ squares on the table. | 100
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| Each square represents __________. | one element
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| Each square includes: | atomic number, chemical symbols name, atomic mass
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| Protons are used as _______. | the atomic number because protons never change.
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| An element's properties can be predicted depending on... | where they are on the periodic table
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| Groups or families are in ________. | 18 vertical columns
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| The group is named by... | the first element on the column
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| Each group reacts _______ with other groups. | differently
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| Group 1 is... | metals
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| Group 1 reacts by doing what with water? | violently
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| Na will ____________ in a bowl of water but NaCl ___________s | dissolves nicely
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| Group 11 reacts __________ with water or not at all | slowly
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| Group 18 ________ react because ___________ are filled | does not; their electro levels
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| The _________ in the valence determines it's bonding. | number of electrons
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| The elements in the same group have ________ number of electrons in the outer levels. | the same
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| Electron levels are lettered from the ____________________. | inside out
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| Levels can hold a ____ number of electrons. | certain
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| K can hold _ electrons. | 2
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| L can hold _ electrons. | 8
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| M can initially hold _ electrons. | 8
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| Elements in the same period have _______ number of electron levels. | same
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| Sodium fluoride | prevents cavities
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| calcium fluoride | tooth polish
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| sodium chloride | table salt
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| Group= | family
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| involved in the transfer or sharing of electrons | valence electron
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