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Questions and Answers
Classify each element as a metal, nonmetal, or metalloid:
Classify each element as a metal, nonmetal, or metalloid:
Sr = Metal Mg = Metal F = Non-metal N = Non-metal As = Metalloid
Which are properties of metals? (Select all that apply)
Which are properties of metals? (Select all that apply)
- They conduct electricity (correct)
- They are malleable (correct)
- They are gases at room temperature
- They are brittle
How many protons, electrons, and neutrons are in 136Xe?
How many protons, electrons, and neutrons are in 136Xe?
54 protons, 54 electrons, 82 neutrons
Classify each element as an alkali metal, alkaline earth metal, halogen, or noble gas:
Classify each element as an alkali metal, alkaline earth metal, halogen, or noble gas:
Which element is a nonmetal in period 5? (Select one)
Which element is a nonmetal in period 5? (Select one)
Which element would you expect to be the most reactive? (Select one)
Which element would you expect to be the most reactive? (Select one)
Determine the total number of electrons each ion has: S2-, Co3+, Ag+, I-
Determine the total number of electrons each ion has: S2-, Co3+, Ag+, I-
Predict the number of electrons each element will gain or lose: O - ______; Ca - ______
Predict the number of electrons each element will gain or lose: O - ______; Ca - ______
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Study Notes
Classification of Elements
- Strontium (Sr) is classified as a metal.
- Magnesium (Mg) is also a metal.
- Fluorine (F) is categorized as a non-metal.
- Nitrogen (N) is considered a non-metal.
- Arsenic (As) is classified as a metalloid.
Properties of Metals
- Metals are known for their ability to conduct electricity.
- They exhibit malleability, allowing them to be shaped without breaking.
- Metals are typically not brittle and are solid at room temperature (except mercury).
- Metals do not exist in a gaseous state at room temperature.
Atomic Structure of Xenon
- Xenon-136 (136Xe) contains 54 protons and 54 electrons.
- It has a total of 82 neutrons.
Classification of Specific Elements
- Neon (Ne) is a noble gas.
- Magnesium (Mg) is an alkaline earth metal.
- Bromine (Br) is classified as a halogen.
- Cesium (Cs) is recognized as an alkali metal.
- Chlorine (Cl) is also categorized as a halogen.
Nonmetals in Period 5
- Iodine (I) is identified as the nonmetal element found in period 5 of the periodic table.
Reactivity of Elements
- Cesium (Cs) is considered to be the most reactive element among Argon (Ar), Strontium (Sr), Beryllium (Be), and itself.
Electron Count in Ions
- Sulfide ion (S2-) has a total of 18 electrons.
- Cobalt ion (Co3+) contains 24 electrons.
- Silver ion (Ag+) possesses 46 electrons.
- Iodide ion (I-) has a total of 54 electrons.
Electron Gain or Loss Predictions
- Oxygen (O) is expected to gain 2 electrons.
- Calcium (Ca) is expected to lose 2 electrons.
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