Help
Options
Term
Dmitri Mendeleev
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Term
This scientist predicted that the empty spaces on his periodic table represented...
Remaining cards (47)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chem
| Term | Answer |
|---|---|
| Dmitri Mendeleev | Who's attributed with the idea of arranging the known elements of his time in a table according to their chemical and physical properties. |
| This scientist predicted that the empty spaces on his periodic table represented... | undiscovered elements |
| Henry Moseley | Who arranged the periodic table of elements in the order of atomic number? |
| The periodic law states there is a periodic repetition of physical and chemical properties of the elements ... | when they are arranged in order of increasing atomic number |
| The vertical columns of the periodic table are called | groups |
| Each period in the periodic table corresponds to | an energy level |
| What are valence electrons? | electrons found in the outermost energy level of atoms |
| The horizontal rows of the periodic table are called? | periods |
| What do elements in the same periodic group have in common? | Same valence configuration, same valence electrons, and similar chemical properties. |
| What do elements in the same periodic periods have in common? | Same number of occupied energy levels- principle energy levels (PEL). |
| How many elements are in a period in which only the s and p sub-levels are filled? | 8 |
| Identify the sub-levels in a period that contains 32 elements | s,p,d,f |
| The number of valence electrons in group 17 element is | 7 |
| For groups 13 through 18 the number of valence electrons is equal to | The group # minus 10 |
| For group two elements, which sub-level are the valence electrons located in? | S |
| Name the three classes of elements | metals, nonmetals, and metalloids |
| Lose electrons | metals |
| Gain electrons | nonmetals |
| dul, brittle | nonmetals |
| Good electrical conductors | metals |
| malleable, ductile | metals |
| Are not conductive | nonmetals |
| The most reactive group of nonmetals | group 17, halogens |
| This group is unreactive, and only found in pure form in nature | group 18, noble gases |
| The group's name means "basic" | group 2, alkaline earth metals |
| Group of metals contains groups 3-12 | groups 3-12, transition metals |
| Group contains the most reactive group of metals | groups 1, alkali metals |
| elements are found in the second row of the f-block elements | actinides |
| The class of elements have both metallic and nonmetallic properties | metalloids |
| Explain why atomic radius decreases going across the period left to right on the periodic table. | The # of energy levels remains the same. The number of protons increases in the nucleus of each successive element atom. This increases the positive nuclear charge - pulling electrons closer to the nucleus. |
| Choose the best reason that the atomic radius generally increases moving down a group of elements. | the number of occupied energy levels increases |
| Which of the following atoms is largest: nitrogen, phosphorous, or arsenic? | arsenic |
| Find phosphorus, sulfur, and chlorine on the periodic table. Which of these is the largest atom? | phosphorus |
| Which of the following atoms is smallest; nitrogen, oxygen, or fluorine? | Fluorine |
| Write a definition for ionization energy | energy required to remove an electron from an atom. |
| Which atom would it take more energy to remove its first electron, sodium or aluminum? | aluminum |
| As you move left to right across a period. the first ionization energies | increases |
| As you move from the top of a group to the bottom, the first ionization energies | decreases |
| Which of these elements have the highest ionization energy? aluminum, silicon, or phosphorus? | phosphorous |
| Why is the third ionization energy of magnesium so much greater than the second ionization energy? | Once the 1st two electrons are removed, mg will be left with a full octet for its outer energy level. |
| Which of these elements have the highest ionization energy? tin, arsenic, or sulfur | sulfur |
| List the following atoms in order of decreasing electronegativity , Cl, K, & Zn | Cl, Zn, K |
| What is the general trend of electronegativity as you go down the group on the periodic table? | Electronegativity decreases moving down a group on the periodic table. |
| What element is the most electronegative? | fluorine |
| do metals tend to have high or low electronegativites? | low |
| Which of the following is the smallest; a lithium atom, Li+ ion, or sodium atom? | Li + ion |
| what is the trend for reactivity for the alkali metal group? | Reactivity increases going down the group |
| The halogens group? | reactivity decreases going down the group |
Created by:
sadiesamson