Elementos y compuestos
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| elemento | sustancia que no se puede separar o romper en sustancias mas simples mediante cambios quimicos.
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| compuesto | sustancia formada por dos o mas atomos unidos mediante formacion quimica
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| elementos que forman la Tierra | oxigeno, aluminio, calcio, potasio, magnesio, niquel, hierro y silicio
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| elementos que forman la atmosfera de la Tierra | nitrogeno, oxigeno y 1% de otros gases
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| elementos que forman el agua de los oceanos | hidrogeno y oxigeno
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| elementos que forman las sales del oceano | sodio, calcio, cloro, sulfuro, magnesio y potasio
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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