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WorksheetsThe Periodic Table
Total questions: 18
Worksheet time: 13mins
Which electronic configuration describes how electrons are arranged in the shells of a chlorine?
2, 8, 6
2, 8, 8
2, 8, 7
2, 7
2, 8
Which electronic configuration describes how electrons are arranged in the shells of a potassium atom?
2, 8, 8, 1
8, 8, 3
2, 8, 8,8, 1
2, 8, 9
2, 8, 7, 2
Which electronic configuration describes how electrons are arranged in the shells of a sodium ?
2, 8, 8, 5
2, 8, 1
2, 8
2, 8, 2
2, 1
Which electronic configuration describes how electrons are arranged in the shells of a sodium ?
2, 8, 8, 5
2, 8, 1
2, 8
2, 8, 2
2, 1
If an atom of an element had 16 electrons, which group of the periodic table would it be in (a) .
Which electronic configuration describes how the electrons are arranged in the shells of an aluminum atom?
2,5,6
2,11
2,3,8
2,8,3
8,5
Which electronic configuration describes how the electrons are arranged in the shells of a carbon atom?
A2,6 B2,4 C2,8 D6 E3,3
2,6
2,4
2,8
6
3,3
How many electrons do most atoms of elements in group 18 of the periodic table have in their outer shell? (a)
What is the maximum number of electrons in the 1st electron shell?
50
32
8
2
18
How many electrons are in the outermost electron shell of fluorine? (a)
What is the atomic symbol for silver? (a)
Which period is mercury found in?
(a)
Cu, Ag, and Au are all in what group # (a)
Dmitri Mendeleev developed the first periodic table to allow for elements yet to be discovered. Why did he leave gaps where others did not?
He grouped elements by their behavior and left a gap if no known element fit his model.
He made his original table unnecessarily large by including duplicates of certain elements.
Others knew about more elements than Mendeleev, so they were able to fill the gaps.
He thought that it was more important that the table looked attractive, so he left artistic spaces.
He was forgetful and missed some of the elements.
During the early 1800s, scientists attempted to understand the chemical elements by sorting them. Which property of the elements was used to order them?
Atomic number
Melting point
Relative atomic mass
Reactivity
Density
Periodic tables have been around for over a hundred and fifty years and some of them look very different from the one we have today. What is it about periodic tables that makes them periodic?
They arrange elements in reference to their reactivity with iodine—they are per-iodic.
They have rows as well as columns.
They group elements based on their behaviors, which repeat periodically from the lighter to the heavier elements. .
They are tables of information that are periodically updated to reflect our current knowledge.
They organize elements based on their periods of radioactivity
How many electrons do atoms of elements in group II of the periodic table have in their outer shell? (a)
How many electrons are in the outermost electron shell of neon?
(a)
