Answer:
Be
Explanation:
Reactivity increases from left to right and decreases from the top of the column to the bottom of column
Answer:
Copper is element number 29
4th row
11th column
Answer:
When substances do not mix thoroughly and evenly (like sand and gravel), the mixture is said to be heterogeneous. A heterogeneous mixture consists of visibly different substances. Another example of a mixture is salt dissolved in water.
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Answer:
who lives in Barclays what?? this makes no sense
Explanation