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Alkali Metals, Alkaline earth metals noble gases
Metals Nonmetals and Metalliods
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vocabulary
100
name a noble gas
helium, neon, argon, krypton, xenon, radon
100
true or false Metals mostly make up the periodic table?
true
100
true or false In a Modern Periodic table are the elements arranged by increasing atomic number?
true
100
As the Atomic number increases within the group what happens to the nucleus? A. the charge on the nucleus increases B. the number of electrons decreases
A. the charge on the nucleus increases
100
define Metals
one of the class's of elements that are good conductors of heat and electric current also metals tend to be ductile, malleable and shiny.
200
name a alkaline earth metal
beryllium, magnesium, calcium, strontium, barium, radium
200
Metals are good conductors of heat and electricity. What is metal a good conductor of?
Metals are good conductors of heat and electricity.
200
what is the electron configuration for helium?
2 1s
200
when looking at trends of the atomic size which way would a arrow go on the periodic table to show the decrease in atomic size? A. up the group B. Across the table
B. Across the table
200
define Atomic Radius
one half the distance between the nuclei of two atoms of the same element when the atoms are joined.
300
what group are the noble gases in?
8A
300
true or false Nonmetals are good conductors of heat
False
300
what are alkali metals, alkaline earth metals and metalliods? A. they are representative elements B. they are transition elements
A. they are representative elements
300
fill in the blank when atoms of the same element are joined to one another these units are called ____? A. ions B. atomic Radius C. Molecules
C. Molecules
300
define ion
an atom or group of atoms that has a positive or negative charge
400
what is the electron configuration for Krypton?
2 2 6 2 6 10 2 6 1s 2s 2p 3s 3p 3d 4s 4p
400
What percentage of the periodic table is made up of metals?
80%
400
what row are the halogens in?
7A
400
What is the Atomic Radius measured in? A.Meters B.Picometers C.feet
B.Picometers
400
define Periodic Law
when the elements are arranged in order of increasing atomic number, there is a periodic repetition of there physical and chemical properties.
500
what group are the alkaline metals in?
1A
500
which of the following is a good conductor of electricity? A.metals B.Nonmetals C.metalliods
A.Metals
500
how many elements have been discovered by 1700? A.100 B.13 C.4
B.13
500
Some compounds are made of....? A.Ions B. mixtures
A.Ions
500
define Halogens
a nonmetal in group 7A of the periodic table.