3755412
Descripción
Test por Karen Moulton, actualizado hace más de 1 año
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Creado por Karen Moulton
hace casi 9 años
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Pregunta 1
Pregunta
Select all of the metals in this list.
Respuesta
-
hydrogen
-
mercury
-
iron
-
gold
Pregunta 2
Pregunta
Which of these is an alloy?
Respuesta
-
iron
-
hydrogen
-
carbon dioxide
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steel
Pregunta 3
Pregunta
Most elements are metals.
Respuesta
- True
- False
Pregunta 4
Pregunta
The Periodic Table of Elements is organized by [blank_start]chemical properties and atomic numbers.[blank_end]
Respuesta
-
chemical properties and atomic numbers.
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physical and chemical properties.
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number of protons and neutrons.
Pregunta 5
Pregunta
[blank_start]Mixtures[blank_end] are two or more substances together.
Respuesta
-
Mixtures
-
Solutions
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Compounds
Pregunta 6
Pregunta
Select all of the compounds listed below.
Respuesta
-
Carbon Dioxide
-
Water
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Sugar
-
Salt
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O2
-
H2
Pregunta 7
Pregunta
Which of these is a molecule of a compound?
Respuesta
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O2
-
CO2
Pregunta 8
Pregunta
How many atoms are in this chemical formula: 2NaHCO3?
Respuesta
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7
-
12
-
9
Pregunta 9
Pregunta
Solutions are mixtures.
Respuesta
- True
- False
Pregunta 10
Pregunta
Sugar is an element.
Respuesta
- True
- False
Pregunta 11
Pregunta
Which of these statements is true for all metals?
Respuesta
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All metals conduct heat and are lustrous.
-
All metals conduct electricity and heat.
Pregunta 12
Pregunta
Mark all choices that state characteristics of metals. (Does not have to be true for all metals).
Respuesta
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are lustrous
-
can be bent without breaking
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can be hammered without breaking
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can not be mixed
Pregunta 13
Pregunta
When you add [blank_start]oxygen[blank_end] to iron, you get a chemical reaction which gives the product, rust.
Respuesta
-
oxygen
-
hydrogen
Pregunta 14
Pregunta
Another name for rust is iron oxide.
Respuesta
- True
- False
Pregunta 15
Pregunta
Mark all that would be evidence of a chemical reaction.
Respuesta
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dissolving
-
foaming, bubbling, fizzing
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clear solution
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temperature change
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precipitate forms
Pregunta 16
Pregunta
Mark all that would be evidence of a saturated solution.
Respuesta
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precipitate forms
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solute on the bottom
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temperature change
Pregunta 17
Pregunta
Which of these would supersaturate a solution?
Respuesta
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cooling it
-
heating it
Pregunta 18
Pregunta
To separate a salt solution, you must use [blank_start]evaporation[blank_end].
Respuesta
-
evaporation
-
a filter
Pregunta 19
Pregunta
The smallest amount of sugar you can have is a/an
Respuesta
-
atom
-
molecule
Pregunta 20
Pregunta
The most abundant element and the most abundant compound in the human body are
Respuesta
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hydrogen and carbon dioxide.
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oxygen and water.
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