The reactivity of metals increases as you move left in a period and as you move down in a group, so Marie needs to know the period and group of the element inside each box. Boxes that show locations in groups 1 or 2 or in period 8 contain the most reactive elements.
Answer:
The sodium atom becomes a positive ion and the chlorine atom becomes neg.
Explanation:
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I think the answer is A. 28 because you add 27 + 1 = 28 and add the 13AL and makes 2813AL
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Answer:
The higher the temperature the more water evaporates and that affects the convection process
Explanation:
