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WorksheetsClassification of Elements
Total questions: 20
Worksheet time: 20mins
Who is known as the father of periodic table, who arranged the elements in order?
Dmitri Mendeleev
Robert Hooke
Jons Jacob Berzelius
John Dalton
Which property of metals is CORRECT?
Dull
Brittle
Semiconductors
Malleable
Cobalt is an example of
Metalloid
Metal
Nonmetal
None of the above
Which of the following is the CORRECT about an element?
It is a pure substance that contains many types of atoms.
Its atom can be separated or broken down into other substances.
It contains only one type of atom and cannot be separated or broken down into other substances.
It is a mixture that contains many substances.
What does it mean when an element is dull?
in liquid state
not glowing or lacking brightness
conducts heat
hard but easy to break
In what state nonmetals can be found?
solid only
liquid only
gas only
solid, liquid, and gas
How many elements are in the periodic table?
110 elements
118 elements
128 elements
188 elements
What does groups in periodic table mean?
column of elements
row of elements
elements in zigzag line
the first element in the periodic table
What is the appearance of of phosphorus at room temperature?
solid
liquid
gas
Sometimes gas
Metalloids have high melting and boiling points.
True
False
Iodine is metalloid.
True
False
Copper is the best electric conductor used today.
True
False
How many periods are there in the periodic table?
18 periods
8 periods
17 periods
7 periods
Why did the symbols have been replaced by letters?
To remember and communicate easily.
To make letters be known in the world.
To make people learn letters.
To write than to draw.
Which of the following is NOT true about nonmetals?
low density and high melting nd boiling points.
Poor conductors of electricity and heat
Examples are radon, argon, helium, and germanium.
Shiny and malleable
What is the element symbol of Bromine?
Be
Br
B
Bi
The scientist who invented symbols to represent some elements, John Dalton, is a _______ scientist.
Russian
Swedish
British
English
The element that has the latin name “Argentum” is
Tin
Silver
Oxygen
Potassium
What is the only metal that is in liquid state at room temperature?
Zinc
Beryllium
Mercury
Nickel
Semiconductors means some elements are poor electricity conductors but become god ones when their temperatures are ___________.
Always the same
Constant
Lower
Higher
