Chem Word Scramble

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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