Fill in the blank:
1. The periodic table is arranged into ___ and ___.
2. There are ___ rows called ___.
3. Columns are called ___.
4. The letters in the box of an elements are the ___.
5. The numbers at the bottom of each box are the ___.
someone help me please? i really need this now.
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Answer:
1. Rows and columns
2. Seven horizontal rows called periods
3. Groups
4. Symbol or chemical symbol
5. Atomic numbers
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