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WorksheetsChemical Composition_G7
Total questions: 25
Worksheet time: 15mins
These are chemical elements whose physical and chemical properties fall in between the metal and non-metal categories.
(a)
What are the 2 main categories of elements in the Periodic Table?
(a)
It is a substance that is made up of two or more different elements chemically combined.
element
compound
mixture
matter
It is a substance that cannot be broken down into two or more simpler substance by chemical methods.
mixture
compound
element
matter
What do you call the zigzag line in the Periodic Table that separates the metals from non-metals?
Hays-McDanies Line
Hays-McDonald Line
Hays-Macdaniel Line
Hays-McDaniel Line
What is the symbol of Hydrogen?
He
Hy
H
H2
What is the symbol of gold?
Ag
Au
G
Go
What is the symbol of silver?
Ag
Au
S
Si
What is the symbol of Copper?
Co
Cu
C
Ca
What is the symbol of Carbon?
Co
Cu
C
Ca
What is the symbol of Helium?
H2
HE
He
H
Different _______ can serve different functions.
purpose
substance
periodic table
matter
Different substances serve different functions as they have different ______.
chemical change
substances
properties
elements
Different substances have different physical properties due to their (a) composition
He is best known for formulating the Periodic Law and creating a version of the periodic table of elements.
Dimetri Mendeleev
Dmitri Mendeleve
Demetri Mendeleeve
Dmitri Mendeleev
A table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
period table
pireodic table
Table periodic
periodic table
It’s the chemical components that make up a substance.
chemical change
physical composition
chemical composition
Physical properties
The pure form of gold is known as ____
18-Carat
18K
24 Carat
34 Carat
Matter in its simplest form is called element.
false
sometimes
true
not sure
Fire works have different colors due to their different_______
physical composition
mass and density
sizes
chemical compositions
In the Periodic Table, elements that are arranged in the same vertical column belong to the same period.
true
false
In Periodic Table, names of elements are represented by numbers
true
false
In Periodic Table, as we moved from left to right of a period, the properties of elements gradually change from those of metals to those of non-metals.
true
false
In Periodic Table, elements in the same group have similar chemical properties.
sometimes
True
False
no one really knows
What substance is this NaCl
(a)
