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| On the right of the metalloids. |
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Definition
| React with water to create hydrogen gas |
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Definition
| Describes something that occurs or repeats at regular intervals. |
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Definition
| The law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements. |
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Definition
| Each horizontal row of elements (from left to right) on the periodic table. |
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Definition
| A vertical column of elements in the periodic table; elements in a group share chemical properties. |
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Definition
| The elements of Group 1 of the periodic table (lithium, sodium, potassium, rubidium, cesium, and francium). |
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Definition
| The elements of Group 2 of the periodic table (beryllium, magnesium, calcium, strontium, barium, and radium). |
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Definition
| Elements of Group 17 of the periodic table (fluorine, chlorine, bromine, iodine, and astatine); They combine with most metals to form salts. |
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Definition
| The elements of Group 18 of the periodic table (helium, neon, argon, krypton, xenon, and radon); noble gases are unreactive. |
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Definition
| They are shiny metals including gold, titanium iron and steel. They conduct thermal energy and electric current well. |
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Definition
| Elements in the first row follow lanthanum. They are shiny, reactive metals. Some of these elements are used to make steel. |
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Definition
| Elements in the second row that follow actinium. All atoms of these are radioactive, or unstable. |
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Term
| Who was Mendeleev and what did he do? |
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Definition
| A Russian chemist, discovered a pattern to the elements in 1869. He arranged the elements in order of increasing atomic mass |
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Term
| Periodic Table of Elements |
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Definition
| Contains each element in periods and families in a grid in each includes the element's name, amount of protons, electrons, symbol |
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Term
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Definition
| They are located on the zig-zag line in the periodic table and are on the right section dividing metals from non-metals. |
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Term
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Definition
one metalloid and five metals
Electrons in the outer level; 3
This group is reactive
and this group's elements are solids at room temperature |
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Term
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Definition
This group contains one nonmetal, two metalloids, and three metals
There are 4 electrons in the outer level.
Reactivity: varies among the elements
They are solids at room temperature |
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Term
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Definition
This group consists of two nonmetals, two metalloids, and two metals.
They have 5 electrons in the outer level.
Their reactivity varies among the elements
They are solids at room temperature (except for nitrogen) |
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Term
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Definition
| very reactive nonmetals because their atoms need to gain only one electron to have a complete outer level |
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Term
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Definition
| It is set apart from the other elements in the table. It is above Group 1 because atoms of the alkali metals also have only one electron in their outer level, it really doesn't belong to a group. |
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Term
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Definition
| Also called families and are vertical columns. |
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Term
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Definition
| Also called rows and are horizontal |
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Term
| The periodic table is like... |
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Definition
| This is like a calendar in that it has rows and columns. |
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Definition
| These are located left and middle of the PTE. |
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