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Carbon and other nonmetallic are found in which are of the periodic table?
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When he was putting his table together, what characteristics did he use to place the elements in order?
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ch 5 chem test
| Question | Answer |
|---|---|
| Carbon and other nonmetallic are found in which are of the periodic table? | Dmitri Mendeleev |
| When he was putting his table together, what characteristics did he use to place the elements in order? | Rows-increasing mass Columns-similar properties |
| What units do you put on atomic mass? | amu |
| What is the definition of atomic mass? | Individual Atoms- number of protons plus number of neutrons Elements- weighted average of the masses of the isotopes |
| Does the atomic number increase or decrease as you move from left to right? How much does one element to the next? | Increases by 1 for each element as you move from left to right |
| The vertical columns on the Periodic Table are called what? | groups |
| The horizontal rows are called what? | period |
| What states of matter are represented by the metals at room temperature (solid, liquid, and/or gas)? | solid and liquid |
| There are two groups on the periodic table that are considered the most reactive, what are they? | alkali metals and halogens |
| How many valence electrons does each of those groups have? | group 1 has 1 and group 17 has 7 |
| Na is a very reactive element in period 3, what other elements in period 2 would be considered reactive? | lithium and fluorine |
| Every element in the Carbon group has how many valence electrons? | 4 |
| Looking at group 2 which element would be the most reactive? | radium |
| If a reaction is going to take place, which Halogen would expect to react the fastest? | fluorine |
| What element do all living creatures contain? | carbon |
| List 4 properties of metals | luster, shine, good conductors, solids |
| If K reacts very violently in water, what you expect Fr to do? Why? | React even more violently - reactivity increases down a period |
| The majority of the periodic table is made up of what kind of elements? | metals |
| What group on the periodic table represents all three states of matter at room temperature? | halogens |
| What do each of the four terms in the element box represents? | 55 - atomic #, Cs - element symbol, Cesium - element name, 132.91 |
| what are valence electrons? | electrons in the outer shell |
| What do elements that belong to the same group have in common? | same number of valence electrons and similar chemical properties |
| What is the "octect rule"? | atoms are most stable if they have filled or empty outer shell of electrons |
| what is the trend in reactivity within the alkali metals and the alkaline earth metals? | reactivity increases as you go down the column |
| What is the trend in reactivity within the halogens? | reactivity decreases as you go down the column |
| Define Ionization energy. Which metal has the highest ionization energy? why? | The amount of energy needed to remove an electron from an atom |
| Define electronegativity? Which element has the highest electronegativity? why? | the ability of an atom to attract or gain an electron |
| List the following elements in order of increasing ionization energy: Li, Ti, Ba, K, Fr. | Fr, Ti, Ba, K, Li |
| List the following elements in order of increasing reactivity: C, S, I, Te, F | C, Te, S, I, F |
Created by:
EmmaRoseDavis