4.
They may or may not have the name, atomic mass and ionic charge. If there are no metals, it is a molecular compound. Material Safety Data Sheets : MSDS available for all hazardous chemicals in the workplace.
Factors Affecting Reaction Rates
Reaction rate refers to how quickly a chemical reaction occurs.
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���1���Y*�i a) lustre: Physical: how well an object reflects like
b) malleability: Physical: how easily an object can be re-shaped
c) ductility: Physical: the ability of an object to be stretched into a wire
d) combustability: Chemical: the ability to burn in oxygen
e) reacts with acid: Chemcial: how an object reacts with acid
f) conductivity: Physical: how well an object can conduct electricity
g) solubility: Physical: how well a chemical can dissolve in water
h) hardness: Physical: how well an object can resist pressure
i) reacts with water: Chemical: how an object interacts with water
j) state: Physical: solid, liquid, or gas
k) brittleness: Physical: how easily the object breaks
11. a) Identify the following substances as pure substances or mixtures. CONDENSATION
5. These atoms easily pick up electrons so they form negative ions (-3, -2 or -1) since there are more electrons with a negative charge than protons with a positive charge.
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MATTER AND CHEMICAL CHANGE
FINAL EXAM PREPARATION
Name: ____________________________ Homeroom: ______
CHEMISTRY STUDY GUIDE
PROPERTIES OF MATERIALS (Textbook pages 94-109, 157-160)
Workplace Hazardous Materials Information System (WHMIS)
Oxidizing material Biohazard
Compressed Gas Poisonous and
infectious
Flammable and combustible Corrosive
Other toxic effects Dangerously
reactive
Wafting: When testing any chemical for the property of odour, do not snort the substance directly. Ionic charge Ionic charge tells you the charged forms the atom may take. Compound: made of two or more types of atoms.pure substance and mixturePure substance: made of an element or compound
Mixture: contains two or more elements or compounds
17.
__electrons_, which are negatively charged, are thought to move around the core in orbits. Grade 9 1st Periodical Test in Filipino – DOWNLOAD (available later) This article is brought to you by Education PH , your reliable partner for learning and success.
Elements in the middle of the periodic table have properties of both and are called metalloids. t u t o r c i r c l e . eBook includes PDF, ePub and Kindle version.
You can tell an element�s ionic charge by looking at some periodic tables. Copyright © 2020 eXam Answers Search Engine, Exam answers free Inc. All Rights Reserved. In order to read or download chemistry paper 2 igcse grade 9 exams ebook, you need to create a FREE account. �? 40. A: Vobject = m/D Vf = Vobject + Vinitial
S: Vobject = (40)/(2.5) = 16 + 15
= 16 mL = 31 mL
P: Therefore the final reading of the graduated cylinder will be 31 mL. 27. Use the formula to tell you the type and number of atoms. stream
This made them realize that matter could be changed. Hazard Symbols: Can We Die? FINAL EXAM PREPARATION.
Where there were gaps in his �game board�, Mendeleyev correctly predicted that they would be filled by future discoveries. The presence of a catalyst will speed up the rate of a chemical reaction. This became known as the Periodic Table. 34. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Chemistry Paper 2 Igcse Grade 9 Exams . P Q a v � � � � � � � � � � � � � � � � � � � � � � � � � � $$If a$
� x gd� �
&d P� � gd�*� gd_ &. Copper is also referred to by ionic charge Cu(I) or Cu(II)
Because ionic compounds consist of at least one metal element (+ ion) and one non-metal element (- ion), they tend to have properties similar to the metal elements on the periodic table: in most but not all ways. We have made it easy for you to find a PDF Ebooks without any digging. Temperature � adding thermal energy increases reaction rate since atoms are moving faster and there is increased chance of collisions but that is not the only reason. 39. Neils Bohr discovered an atomic model with electrons in energy levels around the nucleus. The reaction rate graph shows that with increasing temperature, concentration or surface area, the rate will increase. Use the following information to answer question 9. CHEMICAL REACTIONS (Textbook pages 160-170)
Dangerous Reactions
Caustics -- Battery acid, rust remover, drain cleaner and quick lime. It is exothermic since energy is released. endobj
c o m / c m s / i m a g e s / 4 4 / a t o m i c - s t r u c t u r e - o f - s u l f u r ( 1 ) . t e a c h e r f u r s e . Absorption of heat (endothermic reaction) � temperature decreases, i.e. J.J. Thompson was the first scientist to come up with the idea of subatomic particles and he created the �raisin bun� atomic model. Department Of Basic Education Past Exam Papers Grade 9 Department Of Basic Education Past Exam Papers Grade 9 2017 Nov. Gr. Subatomic particles (particles making up the atom) include protons (positive charges) and neutrons (no charge) inside of the nucleus, as well as electrons (negative particles) outside of the nucleus. endstream
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Chemical properties include reaction with acids (baking soda + vinegar), ability to burn, reaction with water (calcium chloride + water), behaviour in air (iron + air = rust) and reactions to heat (egg + heat = cooked egg). You can figure out the number of neutrons by
subtracting the number of protons (atomic #) from the mass. � lol it did not even take me 5 minutes at all!
Unlike physical changes which can be reversed (since the original substance is still there), chemical changes cannot without adding additional energy. For example, when you add baking soda and vinegar are added together, carbon dioxide gas is formed and the original baking soda and vinegar are gone forever. The exception is when there is a polyatomic ion such as CO3 or SO4.
Presence of a catalyst � this may be in the form of an enzyme in the human body, another chemical, or adding energy (for example, in electrolysis water is broken down into hydrogen and oxygen gas using electrical current). They are poor conductors but good insulators, they have low melting and boiling points, and they can be solid, liquid or gas at room temperature. T�
An element is made up of only one type of atom while a compound is made up of only one type of molecule. Always try and evenly
Oxygen distribute the molecule�s atoms so it looks balanced. This is an totally easy means to specifically acquire guide by on-line. conductivity - ability of a material to allow electrons or heat to flow through it � metals are good conductors, rubber is not. The fewer electrons on the outer ring, the more easily they lose them so metals in group 1 are more reactive than metals in groups 2 or 3. Science Content Standards for California Public Schools Kindergarten Through Grade Twelve (Reprinted, 2003) California Department of Education Reposted ... http://www.cde.ca.gov/be/st/ss/documents/sciencestnd.pdf... English/Language Arts . He arranged them like a solitaire game, in rows and columns. Hardness � 1 (talc) to 10 (diamond)
Colour and luster - how light reflects off of the surface
melting point (solid to liquid), boiling point (liquid to gas), freezing point
(liquid to solid)
malleability (metals can be rolled) and ductility (metals can be stretched)
solubility - amount of mass that will dissolve in a certain volume of water. This allowed him to infer that atoms had a solid nucleus with electrons that were separate from the nucleus.
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