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The Periodic Table Flashcards | StudBud
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The Periodic Table
The Periodic Table
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1
In the Alkali Metals (1A) the tendency to react
Increases from top to bottom in the group
Decreases from top to bottom in the group
Stays the same in the group
Varies in unpredictable ways in the group
2
Which of the following Noble gases emit colors when electric current is applied?
Hydrogen & Helium
Argon & Krypton
Fluorine & Chlorine
Oxygen & Nitrogen
3
As you move from left to right across a period the number of valence electrons in the "A" groups
increases then decreases
decreases
stays te same
increases
4
The atomic mass of an element is
The sum of protons and neutrons in the nucleus
Twice the number of protons in an element
The weighted average of the masses of all of the isotopes of an element
Based on the mass of a Carbon-12 atom
5
Mendeleev gave the name
eka-aluminum
to
unknown element he said would be discovered with properties like aluminum
a compound containing aluminum
a mixture of aluminum and an unknown element
a rare isotope of aluminum
6
Which element is found in nature only in compounds because it is so reactive?
Nitrogen
Oxygen
Helium
Sodium
7
What is the unit for atomic mass?
none of these
amu
gram
ounce
8
What is the name for Group 1A?
The Halogens
Alkali Metals
The Alkaline Earth Metals
The Noble Gases
9
Which of the following 1A elements are most reactive?
Potassium K
Cesium Cs
Lithium Li
Sodium Na
10
At room temperature none of the metals are
malleable
gas
solid
liquid
11
How was the usefulness of Mendeleev;s table confirmed?
The discovery of the missing elements that Mendeleev predicted
The discovery of sub atomic particles
The discovery of the nucleus
Scientists immediately accepted it
12
Atoms of the most reactive elements tend to have
one or seven valence electrons
eight valence electrons
four or five valence electrons
no valence electrons
13
Moving from left to right across a period which value increases by exactly one from element to element?
Atomic mass unit
Isotope number
Mass number
Atomic number
14
Some very reactive elements are stored in
water
pure oxygen
argon gas
liquid mercury
15
Which list contains only metals?
tin, copper cesium
helium, copper, iron
iodine, carbon, argon
carbon, iodine, tin
16
The standard on which the atomic mass unit is based on is the mass of
A proton
A carbon-12 atom
A chlorine-35 atom
A neutron
17
What is the name for Group 7A?
Alkali Metals
Alkaline Earth Metals
The Halogens
The Noble Gases
18
Which element is found in most of the compounds in your body, EXCEPT for water?
Iron Fe
Carbon C
Potassium K
Iodine I
19
Group 7A of the periodic table contains
The most reactive non-metals
The least reactive metals
The most reactive metals
The least reactive non-metals
20
Which element is a
non-metal
that is in the liquid state?
Mercury Hg
Hydrogen H
Bromine Br
Chlorine Cl
21
Identify the areas labelled A & B
A & B are both groups
A is a period & B is a group
A & B are both periods
A is a group & B is a period
22
Which of these group 7A (Halogens) are the most reactive?
Fluorine F
Iodine I
Bromine Br
Chlorine Cl
23
Which of these is
NOT
a property of metals?
Malleable
Good conductors
Ductile
Brittle
24
Two reactive elements in PERIOD 2 are
Beryllium and Neon
Lithium & Fluorine
Beryllium and Magnesium
Boron and Carbon
25
How did Mendeleev arrange the first periodic table?
increasing number of electrons
increasing atomic mass
increasing number of neutrons
increasing atomic numer
