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The Periodic Table
Stack #58547
| Question | Answer |
|---|---|
| independently published periodic tables of the elements in 1868. | Dmitri Mendeleev and Lothar Meyer |
| The periodic table was based on increasing atomic weights and arranged so elements with similar properties were in the same _____. | column |
| Rearranged the periodic table in order of atomic number. | Henry Moseley |
| he Determined the number of positive charges in the nucleus—became the concept of atomic number | Henry Moseley |
| the sum of the numbers of protons and neutrons in a specific isotope | Mass Number |
| Equal to the number of protons in the nucleus as well as the number of protons in the electron cloud | Atomic Number |
| Weighted average of the masses of all the elemets isotopes. Rounding the atomic mass yields mass number of the most commone isotope | Atomic Mass |
| In a Bohr model Energy level 1 holds: | 2 |
| In a bohr model energy evel 2 holds: | 8 |
| In a bohr model, energy level 3 holds: | 18 |
| after the first _______electrons in the 3rd energy level, the following atoms fill energy levels irregularly. | 8 |
| electrons in outermost energy level. | valence electrons |
| ____ represent the number of energy levels | rows |
| ___represent the number of valence electrons | columns |
| Physical Properties of Metals: | Luster, Good conductors of heat and electricity, Ductile, Malleable |
| Chemical Properties of Metals: | easily loose electrons, corrode easily |
| Physical Properties of Non-Metals | No Luster, poor conductors, brittle,not ductile, not Malleable |
| Chemical Properties of Non-metals: | tend to gain electrons |
| Elements on both sides of the zigzag line have properties of both metals and nonmetals. | Metalloids |
| ____: extremely active solids in the 1st column | Alkali Metals |
| _____: family Never found uncombined in nature | Alkali Metals |
| ____:family that Must be stored under oil to keep them from reacting with the air | Alkali Metals |
| ___: family with 1 valence electron | Alkali Metals |
| _____: 2nd column,Slightly less active than Alkali Metals; still highly reactive | Alkaline Earth Metals |
| ____: family where most need to be stored under oil and Not found free in nature | Alkaline Earth Metals |
| ___: elements with 2 valence electrons | Alkaline Earth Metals |
| ____: elements Properties are similar to one another and other metals, but different from other elements | Transition Metals |
| _____:elements that Form brightly colored compounds; used in paint and ceramic glaze pigments | Transition Metals |
| ____;Valence electrons vary; most have 1-3 | Transition Metals |
| ____:Highly reactive family; 7 valence electrons | Halogens |
| Chlorine and fluorine are halogen ___. | Gases |
| ____ is a halogen liquid | bromine |
| iodine and astatine are halogen ____. | Solids |
| this halogen Iodine undergoes sublimation from a solid to a gas | Iodine |
| ____: non-reactive family with 8 valence electrons | Noble Gases |
| All _______ are found in small amounts in the atmosphere. | Nobel Gases |
| ____: non-metal; exists in may forms; 4 valence electrons | Carbon |
| contained in most of the molecules needed for life | Carbon |
| graphite, diamonds, and buckballs are forms of _____. | Carbon |
Created by:
ElizabethI
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