1.1 Atoms and Molecules

Elements are made of 

• many types of atoms 
• the periodic table
• one type of atom 
• molecules 

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What are the 3 particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

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What is an isotope? 

• A charged atom
• An atom with different amounts of neutrons
• An atom with different amounts of protons
• A neutral atom

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^{The photo above shows the isotopic notation for which isotope?}

• Carbon 12
• Carbon 13
• Carbon 14
• Carbon 15

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How many neutrons does an Iodine-133 isotope have?

• 80
• 133
• 53
• 77

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What is the atomic mass of the pictured isotope?

• 2
• 4
• 6
• Hehehehe

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What is the name of the pictured isotope?

• Chlorine-Schmorine
• Chlorine-17
• Chlorine-35
• Chlorine-18

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The relative atomic mass is the average mass of an atom compared to 

• the mass of a carbon-12 atom.
• 1/12 the mass of a carbon-12 atom
• the mass of a hydrogen atom
• 1/12 the mass of a hydrogen atom

What is the unit of relative molecular mass?

• kilogram
• gram
• gram per mole (g/mol)
• no units

An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?

• 9.012 Beryllium

• 12.011 Carbon

• 6.941 Lithium

• 10.812 Boron