AnswersCISD-Chemistry A-CRUnit Test

The History and Arrangement of the Periodic Table Answers

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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
2
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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.
3

Which is classified as an inner transition element?

A
calcium
B
copper
C
fermium
D
helium
4

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.
5

What is the chemical symbol for magnesium?

A
Mo
B
Mn
C
Mg
D
Md
6

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
7

Which element is placed in the same period as ruthenium but has a higher atomic number than it?

A
bismuth
B
osmium
C
silver
D
zirconium
8

How was the work of Newlands similar to that of Mendeleev on the periodic table?

A
They both arranged the elements in order of increasing atomic mass.
B
They both arranged elements that had similar properties into groups.
C
They both predicted the positions of undiscovered elements on the table.
D
They both placed the relative atomic mass of each element on the table.
9

Which scientist established the law of octaves?

A
Antoine Lavoisier
B
Dmitri Mendeleev
C
Henry Moseley
D
John Newlands
10

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.

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