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WorksheetsClassifying the Elements
Total questions: 26
Worksheet time: 24mins
Which of the following statements is correct about the Periodic Table of Elements?
There are 18 Groups and 8 Periods in the Periodic Table of Elements
Periods are the vertical columns of elements
Groups are the horizontal rows of elements
Elements which have the same number of valence electrons are arranged in the same group
In the Periodic Table of Elements, R and S are placed in the same group. If the proton number of R is 19, what is the electron arrangement of element S?
2.8.1
2.8.7
2.8.8.2
2.8.8.5
The atomic radius of Group 18 elements increases when descending the group. This is caused by
increase in the number of electrons
decreasing melting point and boiling point
decreasing solubility in water
increase in the number of shells filled with electrons
The reactivity of Group 17 elements gradually decreases when going down Group 17.
This is due to
atomic size decreases going down the group
decreasing melting point and boiling point
colour of elements gradually darkens going down the group
decreasing strength of the nuclear force of attraction on electron
Change in physical properties of Period 3 elements from left to right in the Periodic Table of Elements is due to
increasing proton number
increasing atomic radius
increasing electronegativity
change in physical state from gas to liquid and finally to solid
This element has variable oxidation numbers and different colours. This element is
a metalloid
amphoteric
a transition element
an alkaline earth metal
The columns on the periodic table are known as ___.
Groups
Periods
Metals
Nonmetals
Which pair of symbols represents a metalloid and a noble gas?
Si and Bi
As and Ar
Ge and Te
Ne and Xe
Which pair of symbols represents a metalloid and a noble gas?
Si and Bi
As and Ar
Ge and Te
Ne and Xe
