Periodic Table
alkali metals and halogens are similar because both are ___.
reactive
elements that bond easily with eachother are __.
reactive
group number, classification, uses, and valence electrons of alkaline earth
2;metal;fireworks, bones, and X-rays;2
group number, classification, uses, and valence electrons of transition metals
3-12;metal;pipes and wires;varies
Which period is tin in?
5
first element of noble gases group
Helium
halogens are ____.
Highly reactive
in the periodic table, all noble gasses are listed where?
In a column on the far right (group 18)
the groups below the periodic table are called ___.
Lanthanides and Actinides
first element of alkali metal group
Lithium
what can radioactive elements be used for?
Medical and nuclear applications
who put the periodic table of elements together?
Mendeleev
alkali, alkaline earth, and lanthanides make up what group?
Metals
how do metals, nonmetals, and metalloids differ?
Metals // conductors, shiny, malleable, ductile Nonmetals // dull, brittle Metalloids // semi conductors
a ___ can contain all three types of elements: metals, nonmetals, or metalloids.
Mixed group
which of the following elements is an alkali metal: Ca, Cu, Fe, Na, Sc
Na
which of the following is a nonmetal: cerium, cesium, carbon, calcium, copper?
carbon
the element potassium has ___ valence electrons. hint : it is in group 1
1
a group is the column of elements numbered ___.
1-18
a period is the row of elements numbered __.
1-7
What are the order of the groups?
1-Alkali 2-Alkaline earth 3-12-Transition metals 17-halogens 18-noble gases
group number, classification, uses, and valence electrons of halogens
17;nonmetal;disinfectant and water purifier;7
nonreactive elements are in what group?
18
group number, classification, uses, and valence electrons of noble gases
18;nonmetal;signs and balloons;8
group number, classification, uses, and valence electrons of alkali metals
1;metal;mediation and batteries;1
which element is in the same family as selenium? A.Po B.Pd C.Pt D.Pd
A.Po
first element of actinides group
Actinium
What family does Rb belong to?
Alkali
a mixture of two or more metals like bronze and steel are called an ___.
Alloy
nonmetals form ____.
Anions
which of the following is a noble gas: Ar, N, H, O
Ar
which of the following metals are on the periodic table? A)bronze B)platinum C)brass D)pewter
B)platinum
the symbol Ag can be used to represent __. A.silver ion B.silver atom C.silver isotope D.gold
B.silver atom
which of the following elements is the most similar to chlorine: H, He, Na, Hg, Br
Br
the property that is not typical of a metal is ___.
Brittle
how did henry mosely recognize the periodic table?
By atomic number
which element is not a transition metal? A.cobalt B.copper C.carbon D.chromium
C.carbon
which of the following elements is an alkaline earth metal: Ca, Cu, Fe, Na, Sc
CA
Which alkaline earth metal has 18 electrons as a stable ion?
Calcium
Which halogen is in the third period?
Chlorine
the element mercury is not a __. A.metal B.liquid C.transition metal D.metalloid
D.metalloid
which subatomic particle determines the chemical behavior of an atom?
Electron
first element of halogen group
Fluorine
first element of nitrogen group
Nitrogen
____ elements are found in periods 6&7; they can be used to make energy in power plants or detect abnormalities in the body.
Radioactive
first element of transition metal group
Scandium
explain the similarities that exist between elements in the same group
They have the same amount of valence electrons
a __ has varying amounts of valence electrons
Transition metal
elements that are man made are called __.
synthetic