Physical and Chemical Changes
Density
Metal, Metalloid, and Nonmetal
Elements and Compounds
Random
100
What are the three of the seven physical properties?
Color, shape, texture, luster, size, mass, or density
100
What is density?
The amount of matter in a given space or a given volume.
100
A substance that is solid, has a shiny orange color, conducts electricity well, and melts when heated could MOST likely be classified as a —
Metal
100
What is the definition for element?
Element is a pure substance that can represented by element symbol of one or two letters.
100
The table below shows characteristics of the element Iron (Fe).
Iron (Fe) is most likely a —
metal
200
What is the definition of a chemical change?
A change in matter that produces new kinds of matter with different properties.
200
Determine the density on g/cm3 of a mineral that has a volume of 3.8 cm3 and a mass of 22.4 g.
5.89 g/cm3
200
Henry finds an element that is light blue, breaks easily in his hand, and does not reflect light. How should Henry classify the element?
Nonmetal
200
What is the element name with chemical symbol Cr.
Chromium
200
The table shows the physical properties of an unknown substance after it was tested in a lab.
Appearance Dull
Conductivity None
Malleability Brittle
This unknown substance is most likely —
Nonmetal
300
What are three indicators of a chemical changes?
Changes in color, temperature, gas formation, Odor, energy, and precipitate (solid) formation.
300
What is the mass of a piece of metal that has a volume of 4.22 cm3 and a density of 7.85 g/cm3?
33.1 g/cm3
300
Silicon (Si) is an element that has a metallic luster, has good heat conductivity, and is very brittle. Silicon is most likely considered a —
Metalloids
300
What is the element symbol for element Tungsten?
W
300
The sample has a mass of 14.7 g and a volume of 2.2cm3. What is the density of the mineral sample?
6.7g/cm3
400
A student made the table below to record his observations when mixing baking soda and vinegar in a beaker
The best evidence for the formation of a new substance is the observation of the —
Bubble forming indicating gas formation.
400
Francisco is performing an experiment that requires 24.5g of ethanol, but Francisco does not have a balance. If he knows that the density of ethanol is 0.79 g/mL, how many milliliters of ethanol will Francisco measure in order to obtain 24.5g?
31mL
400
A certain element is a solid that has a shiny gray appearance at room temperature. This element is very brittle in texture and cannot be hammered into a flat shape without falling apart. This element is most likely classified as —
Metalloid
400
Which element abundant in the atmosphere is easily absorbed and utilized by humans?
Oxygen
400
A manufacturer selected a metal to use in producing a lightweight button for clothing. A metal that has a density 2.71g/cm3 of was selected.
Which of the metals was selected?
Metal 4
500
The list below shows what a student records when they observe a burning candle.
Burning Candle
I. The wax is melting
II. Smoke is produced
III. Heat is released
Which of the following observations of the burning candle indicate a chemical change?
Smoke is produced and Heat is released
500
Helium is six times less dense than air. If the density of air is 0.0013g/cm3, what is the mass of 825mL of helium? Round your answer to the nearest hundredth of a gram.
0.18g
500
Joe's science teacher gave him 10 grams of an unknown solid and asked him to find properties that would help identify it. Joe found that the substance was malleable and readily conducted heat and electricity. It was shiny in appearance and had a high density. Most likely, the sample was —
Metal
500
The acronym "CHNOPS" is often used to help students remember the most abundant elements in living organisms. Using the periodic table, which elements are represented in CHNOPS?
Carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur
500
The student then calculates the densities of the unknown substances and compares them with the table of densities of known substances shown below.
Substance 2