[C9] The Periodic Table Flashcards
what trend do the collection of lithium, sodium, and potassium in Group I show?
a collection of relatively soft metals showing a trend in melting point, density, and reaction with water.
a collection of diatomic non-metals showing a trend in colour and physical state (in group VII) are…..
halogens, chlorine, bromine, and iodine
what are transition elements?
a collection
of metals having high densities, high melting
points and forming coloured compounds, and
which, as elements and compounds, often act as
catalysts
what are noble gases?
unreactive, monoatomic gases (Group VIII)
what’s the use of noble gases?
proving an inert atmosphere
what are some example of where noble gases can be used?
argon in lamps
helium for filling balloons
what are the names of elements that display properties of both metals, and non-metals?
metalloids
what side of the periodic table are most Non-metals?
right side
The metallic character diminishes (decreases) moving ____ to _____ across the Periodic Table
left to right
what’s a “period” in the periodic table?
horizontal rows that show the number of shells of electrons an atom has and are numbered from 1 - 7
what’s a “group” in the periodic table?
vertical columns that show how many outer electrons (also known as valency electrons) each atom has and are numbered from I – VII
what is a valency?
valency tells you how many bonds an atom can make with another atom or how many electrons its atoms lose, gain or share, to form a compound
what is the valency of carbon?
4
as it is in Group IV so a single carbon atom can share 4 electrons to make 4 single bonds or 2 double bonds
where in the periodic table are elements which display properties of both metals and non-metals?
Between the metals and the non-metals
what type of oxides are metals?
basic oxides ( a few are amphoteric)
what type of oxides are non-metals?
acidic oxides (some are neutral)
metals = good conductors or poor conductors?
good conductors of electricity
do metals react with acid?
yes, (many do)
do non-metals react with acids?
no, they do not react with acids
how can you find out the number of outer shell electrons from the given group number?
no. of outer shell electrons = group number
how many electrons does carbon have in its outer shell?
4
what do transition elements form?
coloured compounds (often acting as catalysts.
why do noble gases not take part in chemical gases?
The atoms of noble gases already have complete outer shells, so they have no tendency to lose, gain, or share electrons. (= inert)
give one example of a transition element
silver/gold/platinum/copper
where are transition elements found on the periodic table?
The transition elements occupy the short columns in the center of the periodic table, between Group 2A and Group 3A.
what is the valency of calcium?
2
what is the valency of chlorine?
1
Which statement is correct?
A: Elements listed in order of neutron number
B: Elements listed in order of nucleon number
C: Elements listed in order of proton number
D: Element listed in order of relative atomic mass
C
