2. Atoms & Elements

Periodic Table: Phases

Open Question
In which phase(s) are the molecules held in a defined shape?
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Multiple Choice
Which of the following exists as a diatomic solid at room temperature?
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Multiple Choice
At room temperature and standard atmospheric pressure, which phase(s) does H_2O exist in?
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Multiple Choice
Which of the following elements is a liquid at room temperature and normal atmospheric pressure?
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Multiple Choice
At room temperature, in which states of matter do the halogens exist?
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Multiple Choice
In which phase are the molecules held rigidly together?
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Open Question
What is the main difference between the gas water vapor and the liquid water?
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Multiple Choice
As you move down the periodic table to higher period numbers, what happens to the number of electron shells in the atoms?
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Multiple Choice
In the periodic table, what do the rows (periods) indicate?
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Guided course
02:07
Second Period State of Matter Example
Jules Bruno
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Multiple Choice
At room temperature, in which two states of matter do nonmetals commonly exist?
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Multiple Choice
In a chemical equation, what does it mean when a substance is labeled with (s)?
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Multiple Choice
Which of the following symbols is used to indicate that a chemical is in the gaseous state in a chemical equation?
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Multiple Choice
Which element has the lowest freezing point among all substances?
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Multiple Choice
Which part of the periodic table indicates the number of energy levels (principal energy shells) in the electron cloud of an atom?
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