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The horizontal rows in the periodic table are called
all of them
Chemical and physical properties repeat when elements are arranged by atomic number
metals
periods
Oxygen
across each period
good conductors of thermal energy
atomic mass
According to the Periodic Law
all of them
Chemical and physical properties repeat when elements are arranged by atomic number
metals
periods
Oxygen
across each period
good conductors of thermal energy
atomic mass
Elements to the left of the zigzag line are
all of them
Chemical and physical properties repeat when elements are arranged by atomic number
metals
periods
Oxygen
across each period
good conductors of thermal energy
atomic mass
How many of the recently discovered elements follow periodic law?
all of them
Chemical and physical properties repeat when elements are arranged by atomic number
metals
periods
Oxygen
across each period
good conductors of thermal energy
atomic mass
What element makes up about 20% of the air we breathe?
all of them
Chemical and physical properties repeat when elements are arranged by atomic number
metals
periods
Oxygen
across each period
good conductors of thermal energy
atomic mass
How do the physical and chemical properties of the elements change?
all of them
Chemical and physical properties repeat when elements are arranged by atomic number
metals
periods
Oxygen
across each period
good conductors of thermal energy
atomic mass
Transition metals are
all of them
Chemical and physical properties repeat when elements are arranged by atomic number
metals
periods
Oxygen
across each period
good conductors of thermal energy
atomic mass
Mendeleev arranged the elements according to
all of them
Chemical and physical properties repeat when elements are arranged by atomic number
metals
periods
Oxygen
across each period
good conductors of thermal energy
atomic mass
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