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WorksheetsMidterm exam Chemistry Grade 9_A
Total questions: 17
Worksheet time: 30mins
Which statement best describes an element ?
any combination of two or more atoms of different types
a pure substance made up of only one kind of atom
a substance containing only carbon atoms
any kind of crystal
Which of the following is an extensive property of matter?
boiling point
density
volume
melting point
Which of the following is an intensive property of matter?
energy content
density
volume
mass
Which state of matter is composed of atoms that have lost many of their electrons?
solid
liquid
gas
plasma
What is the difference between a mixture and a compound?
All mixtures have a uniform composition.
Mixtures can be separated by physical processes.
Mixtures are made of at least two different elements.
All mixtures are heterogeneous.
Homogeneous mixtures are also called
atoms
solutions
molecules
compounds
In general, which properties are common to elements within a single group on the periodic table?
atomic number and atomic weight
chemical properties and ability to bond to other atoms
color and luster
boiling point and freezing point
An element near argon in the periodic table would probably be
a good electrical conductor.
a poor heat conductor.
solid at room temperature.
shiny and malleable.
A scientist is working in the lab, with compounds containing carbon. She is most likely working in the field of
inorganic chemistry.
theoretical chemistry.
organic chemistry.
None of the above
A scientist is working with mathematical and computer models to learn about the principles at work in a chemical reaction. He is working in the field of
theoretical chemistry.
physical chemistry.
biochemistry.
analytical chemistry.
An ……………………………………... is the smallest unit of an element that maintains the chemical identity of that element.
(a)
…………………………………………………………… depend on the amount of matter that is present
(a)
The ……………………………. are the substances that react in a chemical change
(a)
1- The horizontal rows of elements in the periodic table are called ……………………………….
(a)
1- A ……… (a) is an element that is a good electrical conductor and a good heat conductor .
Describe the difference between a heterogeneous mixture and a homogeneous mixture, and give an example of each.
Name three characteristics of metals.
