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Periodic Trends Flashcards | StudBud
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Periodic Trends
Periodic Trends
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periodic table chemistry
Flashcards
43 cards
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Practice quiz
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Questions
43
Answers
1
What is larger - the first ionization energy for Li, or the second ionization energy for Li?
same
2nd
neither
1st
2
See graph of atomic radii vs. noble gas element. Explain the reason for the trend observed.
Atomic radius increases because nuclear charge is increasing
Atomic radius increases bc more attraction of e- to nucleus
Atomic radius increases because the elements are noble gases
Atomic radius increases because there are more energy levels
3
When an atom of calcium becomes a calcium ion (Ca
2+
), the atom must
lose two electrons
gain one neutron
lose two protons
gain one electron
4
Has the highest first ionization energy.
b
a
d
c
5
The repetition of similar properties on the periodic table is called
the law of chemical change
the reactivity law
the law of conservation
the periodic law
6
The elements with the most electronegativity are located where on the periodic table?
upper right
lower right
upper left
lower left
7
How many Valence Electrons do Alkali metals have?
Two
One
Three
Four
8
Why don't we assign an electronegativity value to noble gases?
they do not form ionic bonds
they are unreactive thus don't attract electrons
they are radioactive
they are unstable
9
Which has the smallest ionization energy?
Fr
Se
F
K
10
Which has the larger ionic radii?
Ca+2
K+
Br-
Cu+1
11
Which area of the periodic table has the greatest coulombic attraction?
bottom left
top right
bottom right
top left
12
Which block is NOT part of the representative elements?
S
P
D
13
Electronegativity tends to decrease across a period
False
True
14
Which element has the greatest Coulombic attraction?
As
Br
K
Ca
15
Why is the 2nd ionization energy for lithium larger?
wants to lose an electron
unstable
wants to gain an electron
already stable-entering into a full energy level
16
Which has the largest electronegativity?
francium
helium
fluorine
Iodine
17
All of these have electron configurations that end with p
5
.
Alkali Metals
Halogens
Noble Gases
Alkaline Earth Metals
18
What charge do elements in the halogen group have when they form ions?
+2
+1
-2
-1
19
Which has the largest electronegativity?
helium
fluorine
francium
Iodine
20
The halogens here are indicated with
red
yellow
purple
green
21
Why does an anion get larger?
Electron attraction
Electron repulsion
More energy levels
Less energy levels
22
Which of the following elements has the smallest ionic radii
bromine
Sulfur
Selenium
Chlorine
23
This scientist arranged the Periodic table in order of atomic number.
Moseley
Meyer
Mendeleev
Newlands
24
What are the least reactive elements?
Zn, Al, Fe
Li, Na, K
Be, Mg, Ca
He, Rn, Ar
25
When an atom becomes an anion, it gets...
smaller
larger
stays the same size
26
Who developed/arranged the Periodic Table based on the properties of elements?
Niels Bohr
Dimitri Mendeleev
John Dalton
Fritz Haber
27
The alkali metals and alkaline earth metals react with non-metals, always ___
gaining electrons, forming anions
losing electrons, forming anions
losing electrons, forming cations
gaining electrons, forming cations
28
Which has the larger ionic radii?
K+
Ca+2
Br-
Cu+1
29
How many valence electrons does an element in group 14 have?
2
0
14
4
30
Which element is a semiconductor?
sulfur
calcium
silicon
copper
31
Vertical columns of elements in the periodic table are called
periods
groups
series
rows
32
Metals
are shiny and brittle.
are poor conductors of heat and electricity.
are good conductors of heat and electricity.
are good insulators.
33
Which atom has the lowest ionization energy?
Be
Cs
Sr
Ca
34
Which element has the largest atomic radius?
K
Na
Li
Fr
35
Which of these is a metalloid?
As
Ca
K
Be
36
The halogens are found in
group 4
group 17
group 3
group 13
37
Horizontal rows of elements are called
families
columns
periods
series
38
The most reactive metals are found in this group...
lanthanides
alkali
alkaline earth metals
halogens
39
The Modern Periodic Table arranges elements according to:
boiling points
atomic mass
atomic number
melting points
40
When an atom becomes a cation, it gets...
stays the same size
larger
smaller
41
Why is the electronegativity of most noble gases zero?
They have small atomic radii
They have full valence shells
They are gases
They have very reactive
42
Which element has the greatest Coulombic attraction?
Xe
Ne
Kr
Ar
43
Why does a cation get smaller?
More energy levels
Less energy levels-more coulombic attraction
Electron repulsion
Electron attraction
