Answers26-27 WHS-Chemistry-1stSixWeeksAtomic Numbers and Electron Configurations

The History and Arrangement of the Periodic Table Answers

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1
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Members of which group easily lose an electron to form a +1 cation?

A
halogens
B
alkaline earth metals
C
noble gases
D
alkali metals
2
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Who is credited with creating the first periodic table?

A
Johann Dobereiner
B
Henry Moseley
C
Dmitri Mendeleev
D
John Newlands
3

How did the work of Dmitri Mendeleev differ from that of John Newlands in the development of the periodic table?

A
Mendeleev arranged the elements according to increasing atomic mass.
B
Mendeleev predicted elements that would later be discovered.
C
Mendeleev identified elements that had similar properties.
D
Mendeleev organized elements into triads based on their properties.
4

How did Moseley establish a more accurate periodic table?

A
by arranging the elements according to atomic mass instead of atomic number
B
by arranging the elements according to atomic number instead of atomic mass
C
by arranging the elements into horizontal periods
D
by arranging the elements into vertical groups
5

Which element is a halogen?

A
argon
B
bromine
C
calcium
D
lithium
6

Moseley made revisions to the periodic table that resolved some of the problems with Mendeleev’s version. Which of these was a result of his revisions to the periodic table?

A
The revised periodic table could account for the discovery of new elements.
B
The revised periodic table could account for variations resulting from isotopes.
C
Scientists could begin to write new information onto each element.
D
Scientists could begin to place the table on a single sheet of paper.
7

Which element has the greatest average atomic mass?

A
iodine
B
bromine
C
tellurium
D
krypton
8

Which property would cesium most likely have?

A
It is hard.
B
It is ductile.
C
It is a gas.
D
It has low reactivity.
9

What is the chemical symbol for magnesium?

A
Mo
B
Mn
C
Mg
D
Md
10

Who wrote the first modern chemical textbook?

A
Antoine Lavoisier
B
Dmitri Mendeleev
C
Henry Moseley
D
Johann Dobereiner

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