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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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Practice quiz
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Questions
20
Answers
1
How many neutrons does an atom of the following element have?
7
3
4
6.9
2
Which element is the most reactive nonmetal?
Hydrogen
Fluorine
Mercury
Astatine
3
Which group of metals is the most reactive?
halogens
alkaline earth metals
alkali metals
Group 17
4
What are valence electrons?
outer energy level electrons
inner electrons
middle electrons
5
The # that tells you the # of P+
number of neutrons
atomic mass
mass number
atomic number
6
What is the mass number of the following element?
117
79
197
196.966
7
What is the atomic number of the following element?
79
197
196.966
569
8
What is the atomic mass of the following element?
197
196.966
4
79
9
How do you find the number of neutrons in an atom?
mass minus neutrons
atomic # minus mass
protons plus neutrons
Mass # minus Atomic #
10
Which group on the periodic table is the least reactive?
alkali metals
halogens
noble gases
alkaline earth metals
11
What is the second element in group 2?
Manganese
Magnesium
Lithium
Beryllium
12
How many valence electrons does Carbon have?
4
5
7
6
13
Which element is the most reactive metal?
Aluminium
Cesium
Radon
Fluorine
14
Which group of nonmetals is the most reactive?
halogens
alkali metals
alkaline earth metals
Group 1
15
The mass # is figured by rounded what other #
number of protons
number of neutrons
atomic mass
atomic number
16
Which # is the weighted average of all of the isotopes of an element found in nature?
equal to the # of protons
the mass number
the atomic mass
the atomic number
17
What is the unit used to measure atomic mass?
Htz
liters
grams
amu
18
What is the third element in period 5?
Phosphorus
Yttrium
Tantalum
Scandium
19
How many valence electrons does Nitrogen have?
5
3
6
7
20
How many valence electrons do the following elements have?
5
1
7
2
