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12 Cards in this Set
- Front
- Back
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What does the number at the top of the element box represent?
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It's atomic number
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What does the number at the bottom of the element box represent?
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It's atomic mass
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How do you find the number of nutrons from an element box?
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atomic mass - atomic number = number of nutrons
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What were the three missing elements from Dmitri Mendeleev's first Periodic Table?
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Gallium (31), Germanium (32), and Scandium (21)
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What is an element?
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Any substance that can not be broken down into another substance
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How is the current Periodic Table of Elements organized?
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1. Atomic Number
2. By properties |
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How was Mendeleev's Periodic Table of Elements organized?
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1. Atomic Mass
2. By properties |
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How many columns, groups, or families are there in the Periodic Table?
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18
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How many rows or periods are in the Periodic Table?
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7
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The atomic number is also the ________________?
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Number of Protons and Electrons
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What are the seven things that you can from an element box?
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1. Atomic Number
2. Number Of Protons 3. Number Of Electrons 4. Symbol 5. Name 6. Atomic mass 7.Number Of Electrons |
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What is matter?
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Anything that has mass and takes up space
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