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- 1. Multiple Choice
One of the advantages of classifying elements systematically in the Periodic Table of Elements is
Making it easier for the scientists to choose atoms
Knowing the number of neutrons in an element
Predicting the chemical characteristics of an element
Identifying the scientist who discovered the element
- 2. Multiple Choice
Which of the following statements is true about the Periodic Table of Elements?
There are 18 Groups and 8 Periods in the Periodic Table of Elements
Groups are the horizontal rows of elements
Periods are the vertical columns of elements
Elements that have the same number of valence electrons are arranged in the same group
- 3. Multiple Choice
Scientists who have contributed to the classification of elements in the Periodic Table are as follows except
John Newlands
Lothar Meyer
Anton Mendeleev
Henry Moseley
- 4. Multiple Choice
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
- 5. Multiple Choice
The size of atoms in Group 18 get larger down the group. This is caused by
the increase in the number of electrons
the decrease in melting point and boiling point of the elements
the increase in solubility rate in water
the increase in the number of shells filled with electrons
- 6. Multiple Choice
During a chemical reaction, every alkali atom in Group 1
releases one valence electron to achieve duplet or octet electron arrangement
releases two valence electrons to achieve duplet or octet electron arrangement
releases three valence electrons to achieve duplet or octet electron arrangement
releases four valence electrons to achieve duplet or octet electron arrangement
- 7. Multiple Choice
The reactivity of Group 17 elements decrease down the group. This is caused by
the decrease in atomic size down the group
the decrease in boiling point and melting point
the colour of element getting darker down the group
the attractive force of the nucleus on the electron getting weaker
- 8. Multiple Choice
The change in physical properties of the elements across Period 3 from left to right in the Periodic Table of Elements is due to
the increase in proton number
the increase in the radius of atoms
the decrease in electronegativity
the change in physical state from gas to liquid and finally to solid
- 9. Multiple Choice
This element has two or more oxidation numbers and forms compounds that have different colour. This element is
metalloid element
amphoteric element
transition element
alkaline earth metal element
- 10. Multiple Choice
Name the element that is used as a catalyst in the Ostwald Process to produce nitric acid.
Nickel
Platinum
Metal
Vanadium(V) oxide
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