introduction to periodic table and atomic stability Flashcards

1
Q

what are periods

A

horizontal rows
seven
numbered using arabic numbers
elements in same period all have same number of occupied electron shells

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2
Q

groups

A

vertical columns
mainly eight
numbered using roman numerals
for groups 1 to 7 number of valence electrons same as group number

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3
Q

where are the metals mainly located

A

left side

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4
Q

what are the elements in group 0

A

inert or noble gases
have full valence shell

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5
Q

what do other atoms of periodic table want to achieve

A

full stability by gaining or losing electrons in valence shell

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6
Q

define ion

A

particle with positive or negative charge where the number of protons and electrons are unequal

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7
Q

which groups lose electrons

A

1 2 3 to form positive charged ions called cations —- metals

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8
Q

which groups gain electrons

A

5 6 7 gain an electron and form negatively charged ions called anions —— non metals

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