Chemical/Physical Changes
Chemical/Physical Properties
Mystery
Compounds & Mixtures
Periodic Table
100
Which of the following is a chemical reaction?
1. sugar dissolving
2. alcohol evaporating
3. glass melting
4. nails rusting
4. nails rusting
100
Which of the following is an example of a physical property?
Flammability
Reactivity
Oxidation
Color
4. Color
100
Which task in the kitchen is an example of a physical change?
melting butter
toasting bread
frying an egg
baking a cake
1. melting butter
100
Which of the following is best classified as a compound?
Oxygen(O2), because it contains two of same.
Helum(He), because it contains only one type of atom.
Manganese (Mn), because it contains a metal and a nonmetal.
Carbon dioxide (CO2), because it contains two different types of atoms.
4. Carbon dioxide (CO2), because it contains two different types of atoms.
100
Which element is a member of the Noble Gas family?
sodium (Na)
chlorine (Cl)
Xenon (Xe)
oxygen (O)
3. Xenon (Xe)
200
Which of the following is an example of a physical change?
An electrical current splits water into hydrogen and oxygen.
A person inhales oxygen and exhales carbon dioxide and water.
Ice cream melts in a bowl.
A silver spoon tarnishes over time.
3. ice cream melts in a bowl
200
Temperature, shape, texture, and size are all examples of:
chemical properties
physical properties
chemical changes
physical changes
2. physical properties
200
Which statement best describes the change to an ice cube as it melts?
The change is chemical because ice has a lower density than water.
The change is chemical because water has a different pH than ice.
The change is physical because the substance remains the same.
The change is physical because the state of matter remains the same.
3. The change is physical because the substance remains the same.
200
Examples of pure substances, or ___________ are oxygen, boron and silver.
Mixtures
Compounds
Elements
Atoms
3. Elements
200
Which statement best describes the organization of the Periodic Table of the Elements?
Elements within a group have similar properties.
Elements within a period have the same number of electrons.
All gases are in the same period together.
Gases easily form compounds with other elements.
1. Elements within a group have similar properties.
300
Chemical reactions:
can easily be undone.
occur only between metals and nonmetals.
create new substances with different properties.
are a change in size, shape, or state.
3. create new substances with different properties.
300
Which best represents a physical property of a substance?
Sodium combines with chlorine to create sodium chloride.
Hydrochloric acid reacts with zinc metal, creating hydrogen gas.
Acids act as a corrosive to metal.
Gold has a density of 19.3 g/cm3.
4. Gold has a density of 19.3 g/cm3.
300
How do you determine the difference between an element and a compound?
An element is used to make matter and a compound is used to make mixtures.
An element is a pure substance made of 1 type of atom and a compound is a pure substance made of multiple types of atoms.
An element is a pure substance that is composed of two more different types of atoms and a compound is made of only 1 type of atom.
An element is a pure substance made of only 1 type of atom and a compound is made of multiple types of atoms and is not a pure substance.
2. An element is a pure substance made of 1 type of atom and a compound is a pure substance made of multiple types of atoms.
300
Blood, trail mix, and salad are all examples of ______________.
Mixtures
Compounds
Elements
Atoms
1. Mixtures
300
Which best explains how elements are arranged on the modern periodic table?
Elements are arranged from most electrons to fewest electrons.
Elements are arranged from fewest protons to most protons.
Elements are arranged from most protons to fewest protons.
Elements are arranged from fewest neutrons to most neutrons.
2. Elements are arranged from fewest protons to most protons.
400
Which best describes a solid produced in a solution during a chemical reaction?
Reactant
Precipitate
Acid
Solute
2. Precipitate
400
What property of liquid does the graduated cylinder pictured below measure?
1. Mass
2. Density
3. Volume
4. Weight
3. Volume
400
Both hydrogen peroxide (H2O2) and water (H2O) consist of the elements hydrogen (H) and oxygen (O). Which best explains why drinking hydrogen peroxide is not advisable?
The elements in hydrogen peroxide are chemically altered after combining into completely different elements.
The elements in hydrogen peroxide are physically altered after combining into completely different elements.
Hydrogen peroxide has different properties because the elements are chemically combined in a different ratio than the elements in water.
Hydrogen peroxide has different properties because the elements are physically bonded in a different ratio than the elements in water.
3. Hydrogen peroxide has different properties because the elements are chemically combined in a different ratio than the elements in water.
400
Salt (NaCl) is best classified as a(n) _____________.
Mixture
Compound
Element
Atom
2. Compound
400
An unknown sample is malleable and ductile. Where would the sample most likely be found on the periodic table?
far left
far right
Stair step
bottom
1. far left
500
When baking soda and vinegar react, the product includes bubbles. What has most likely occurred?
oxidation
precipitate formation
gas formation
exothermic reaction
3. gas formation
500
Which of the following is a chemical property?
1. Flammability
2. Hardness
3. Malleability
4. Color
1. Flammability
500
Recovering the salt from a mixture of salt and water could best be accomplished by _________________.
paper chromatography
density determination
Evaporation
Filtration
4. Filtration
500
A scientist recognizes a white powder as sugar due to its white crystals and its sweet taste. However, the scientist notices that the elements that make up the sugar – carbon, hydrogen, and oxygen – look nothing like sugar, nor are they sweet. What is the best explanation for this?
Substances in nature change randomly and it is impossible to predict those changes
Sugar is a compound; compounds usually have different properties than the elements of which they are made.
Sugar is an element, so its properties are unique.
Sugar is a heterogeneous mixture, so its appearance is unique.
2. Sugar is a compound; compounds usually have different properties than the elements of which they are made.
500
Where on the periodic table are you most likely to find elements that do not react with other elements?
group 18
group 17
group 2
group 1
1. group 18