Chem 1020 Exam 2
Row is called _______ on the periodic table - answer period
Column is called _____ on the periodic table - answer group
How are elements grouped by similarity on the periodic table? - answer By
group/column
Metals, metalloids, and nonmetals on the periodic table - answer most are metals - all of
the ones on the left and middle (except Hydrogen on top) until the staircase of
transitional metals, and then the nonmetals on the right upper side
Alkali metals - answer Group A1
lithium, sodium, potassium, etc. soft metals that react violently with water
Alkaline earth metals - answerGroup 2A
magnesium and calcium
also reactive but less violent than the alkali metals
Halogens - answerGroup 7a
all exist as diatomic - two
react quickly with metals and others to form compounds (bleach, teflon, table salt, etc)
Noble Gases - answerGroup 8A
very stable, don't really react with other elements to form compounds - all gases at room
temp
How do you describe particles? - answerMass
Charge
1 AMU - answer1.66 x 10^-27 kg (protons and neutrons are about 1 AMU)
atomic number - answerthe number of protons/electrons in an atom
mass number - answersum of the number of protons and neutrons in an atom (periodic
table doesn't show this)
Isotope - answeratoms with the same number of protons but different numbers of
neutrons
(same atomic number different mass number)
How to find the number of neutrons in an atom - answerMass number - atomic number
Row is called _______ on the periodic table - answer period
Column is called _____ on the periodic table - answer group
How are elements grouped by similarity on the periodic table? - answer By
group/column
Metals, metalloids, and nonmetals on the periodic table - answer most are metals - all of
the ones on the left and middle (except Hydrogen on top) until the staircase of
transitional metals, and then the nonmetals on the right upper side
Alkali metals - answer Group A1
lithium, sodium, potassium, etc. soft metals that react violently with water
Alkaline earth metals - answerGroup 2A
magnesium and calcium
also reactive but less violent than the alkali metals
Halogens - answerGroup 7a
all exist as diatomic - two
react quickly with metals and others to form compounds (bleach, teflon, table salt, etc)
Noble Gases - answerGroup 8A
very stable, don't really react with other elements to form compounds - all gases at room
temp
How do you describe particles? - answerMass
Charge
1 AMU - answer1.66 x 10^-27 kg (protons and neutrons are about 1 AMU)
atomic number - answerthe number of protons/electrons in an atom
mass number - answersum of the number of protons and neutrons in an atom (periodic
table doesn't show this)
Isotope - answeratoms with the same number of protons but different numbers of
neutrons
(same atomic number different mass number)
How to find the number of neutrons in an atom - answerMass number - atomic number
