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WorksheetsGrade 9 Chemistry
Total questions: 30
Worksheet time: 10mins
Which of the following statements is NOT part of the Particle Theory of Matter
All matter consists of tiny particles with empty spaces between them
Particles are never in motion
Particles attract each other
Different substances consist of different kinds of particles
"A substance that is made up of only one type of particle" describes...
Alloy
Mechanical Mixture
Pure Substance
Solution
"A characteristic of a substance that can be determined without changing the composition of the substance" is...
Chemical property
Matter
Physical property
Tag
Which of the following characteristics is NOT a physical property?
Combustibility
Lustre
Malleability
Optical Density
It is always accompanied by a change in the starting substance(s) and the production of one or more new substances.
Chemical Behaviour
Chemical Change
Chemical Reaction
Physical Change
Gold has a density of 19.32 g/cm3. You have 14 250 g of gold (...its mass). What volume of gold do you have?
1.4 X 10-3 cm3
2.75 X 105 cm3
1.43 X 104 cm3
7.38 X 102 cm3
"A measure of how much mass is contained in a given unit volume of a substance" is...
Viscosity
Solid Precipitate
Ductility
Density
Which of the following is NOT an example of chemical change?
Gas production
Heat released
Electricity conducted
Solid precipitated formed
"A pure substance composed of two or more different elements that are chemically bonded" is...
Compound
Element
Mechanical Mixture
Solution
An element that is malleable, conducts heat, ductile and generally a solid at room temperature is...
Metal
Non-metal
Metalloid
Any of the above
All elements in Group 1 (Alkali Metals) have an ionic charge of....
1-
2-
2+
1+
To which chemical family do the stable or non-reactive elements belong?
Alkali Metals
Halogens
Noble Gases
Transition Metals
Electrons occur in energy shells around the positive-charged nucleus. What are the electrons found in the outer most electron shell called?
Conductors
Energy electrons
Periods
Valence electrons
An element may give electrons to achieve a state of electron configuration stability. What type of ion now exists?
Anion
Cation
Ion charge
Positive charge
Thomson discovered that negatively charged particles could be emitted by a very hot material (...called electrons). Thomson knew the atom was neutral, and thus, he concluded the rest of the atom must be positively charged. Thomson hypothesized the electrons would be equally distributed throughout the atom. His model was called...
Billiard Ball
Indivisible Atom
Plum Pudding
Substances
What experiment did Ernest Rutherford perform to determine that the atom contained a concentrated, positively charged, central mass (i.e., nucleus)?
Emission of particles from hot material experiment
Gold foil experiment
Third particle experiment
Zero charge experiment
A diagram showing a central nucleus and orbiting electrons located in different energy orbits is called...
Bohr-Rutherford diagram
Chadwick's theory
Lewis dot diagram
Model of Indivisibility
Atomic Mass consists of...
Electrons
Electrons - protons
Neutrons + protons
Protons + electrons - nuetrons
The mass of one proton is...
Undetermined
Atomic Number
One
None of the above
How many valence electrons occur in the element sulfur?
One
Six
Three
Two
What element is shown?
Argon
Calcium
Chlorine
Fluroine
In an element...
Number of protons = Number of neutrons
Number of electrons > Number of protons
Number of neutrons is the Atomic Mass
Number of electrons = Number of protons
Which of the following statements correctly describes the Atomic Number of an element?
Number of protons in the nucleus
Number of electrons in the nucleus
Total number of electrons, neutrons and protons
Number of neutrons in the nucleus
What is "...a molecule consisting of atoms of the same element" (e.g., O2, N2) called?
Chemical formula
Ionic compound
Molecular compound
Molecular element
If the atom loses an electron, the ion has a ______________ charge.
Negative
No charge
Positive
Zero
What type of compound forms when a positively charged cation bonds with a negatively charged anion
Covalent bond
Ionic compound
No bond occurs
Polyatomic
What is the correct chemical formula for sodium phosphide?
NaP3
NaP
Na3P
3NaP
What is the correct chemical name for CaF2?
Calcium diflouride
Calcium fluoride
Calcium(II) fluoride
Calcium fluorine
There are seven elements that from molecules consisting of two atoms (e.g., H2, Cl2, O2). In nature, these elements ALWAYS exist as two bonded atoms. What name is given to these elements
Atomic molecules
Biatomic molecules
Cooperating molecules
Diatomic molecules
The chemical formula for the sugar glucose is C6H12O6. What is the TOTAL number of atoms in one molecule of glucose?
3
6
12
24
