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Chemistry - Ch 5 Periodic Table Flashcards | StudBud
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Chemistry - Ch 5 Periodic Table
Chemistry - Ch 5 Periodic Table
20 terms
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Continuing our introduction to isotopes, valence electrons, and the periodic table
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
What's different about the isotopes U-234 and U-235?
U-235 has one more electron
U-235 has one more neutron
U-235 has one more proton
2
Which of these pairs of elements are isotopes?
O2- , O-
Fe-57, Fe-58
1H, H
14C, 12C
3
How do we group the periodic table now?
by weight
by number of neutrons
by number of protons
by properties
4
What characteristic is shared by all of the alkali metals?
one valence electron
radioactive
gas at room temperature
violent reaction in water
5
Which elements tend to be radioactive?
metals
the alkali metals
Those at the bottom of the periodic table
Those with numbers above 83
6
Potassium (K) explodes in water, but we need potassium to live. Huh?
K bonds easily with other atoms and is safe when bonded
Oh no!! You're full of potassium!! *BOOM*
7
What is the maximum number of valence electrons?
14
8
16
10
8
How did Mendeleev order the elements on the periodic table?
by volume
by number of protons
by weight
9
Which electrons participate in chemical reactions?
valence electrons
none of them
all electrons
outer electrons
10
What are some characteristics of metals?
brittle
conductive
malleable
insulating
11
Which characteristic is shared by all of the halogens?
have 5 valence electrons
have 7 valence electrons
react more strongly as you go up the column
react violently with water
12
Why didn't we watch the video of francium in water?
cesium was cool enough
no one likes francium
because it could never be real
because it wasn't real
13
How many valence electrons does neon have?
9
7
8
10
14
How many valence electrons does carbon have?
5
7
4
6
15
Which metal is liquid at room temperature?
iron
silicon
mercury
titanium
16
Who is this guy?
Isaac Newton
Dmitri Mendeleev
Daniel Day-Lewis
Alan Moore
17
If Silicon has 4 valence electrons, how many valence electrons does Carbon have?
4
6
Cannot tell from the information given.
8
18
Which two things must be true of an isotope?
they have the same number of electrons
they have a different number of neutrons
they have the same number of neutrons
they have the same number of protons
19
Choose a nonmetal.
magnesium
sulfur
iridium
carbon
20
What is the meaning of an element's atomic number?
it is the number of protons
it is its weight
it doesn't mean anything, it's just how we put them in order
it is the sum of the protons and neutrons
