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Periodic Table Flashcards | StudBud
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Periodic Table
Periodic Table
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periodic table, reactivity, valence electrons
Flashcards
20 cards
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Questions
20
Answers
1
What is the mass number of the following element?
197
79
196.966
117
2
Mendeleev arranged the elements in the periodic table based on their
atomic number
mass
number of electrons
number of neutrons
3
How many valence electrons does Nitrogen have?
3
6
5
7
4
What is the second element in group 2?
Magnesium
Beryllium
Manganese
Lithium
5
Which element is the most reactive nonmetal?
Hydrogen
Francium
Flourine
Astatine
6
Which group of nonmetals is the most reactive?
Group 1
halogens
alkali metals
alkaline earth metals
7
How many valence electrons do the following elements have?
2
1
7
5
8
How do you find the number of neutrons in an atom?
mass - protons
atomic # - mass
protons + neutrons
mass-neutrons
9
The weighted average of all of the isotopes of an element found in nature is
the atomic number
equal to the # of protons
the atomic mass
the mass number
10
Which group on the periodic table is the least reactive?
alkaline earth metals
alkali metals
noble gases
halogens
11
The mass number is the rounded
atomic number
number of protons
atomic mass
number of neutrons
12
What is the unit used to measure atomic mass?
amu
Htz
grams
liters
13
What is the atomic mass of the following element?
79
4
197
196.966
14
How many neutrons does an atom of the following element have?
6.9
3
4
7
15
What is the atomic number of the following element?
569
196.966
197
79
16
What is the third element in period 5?
Scandium
Yttrium
Tantalum
Phosphorus
17
The number of protons is equal to the
atomic number
atomic mass
number of neutrons
mass number
18
Which element is the most reactive metal?
Francium
Radon
Flourine
Cesium
19
Which group of metals is the most reactive?
alkali metals
alkaline earth metals
Group 17
halogens
20
What are valence electrons?
outer energy level electrons
inner electrons
middle electrons
