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Two solids, A and B, are located in the same family on the periodic table. A sample of each is placed in a beaker of HCL. Substance A produces few bubbles, while substance B bubbles vigorously.

What do the bubbles indicate? (chemical reaction ?)
where the substances are located in relation to one another on the periodic table and the activity series?( B is lower than A, and more reactive)
The name of the family the substances could be in ?
What substance will have a larger atomic radius? (B?)
What substance will have a larger ionization energy?

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What do the bubbles indicate? chemical reaction with HCl, release of H2(g) 

Where the substances are located in relation to one another on the periodic table and the activity series? A is above B on the periodic table but B is above A in the activity series.

The name of the family the substances could be in ?  alkaline earth, alkali metals. Either group 1 or group 2.

What substance will have a larger atomic radius? B
What substance will have a larger ionization energy? A

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