3 years ago

Why do some atoms form positive ions and others form negative ions?

1 answer:

6 0

Atoms for negative or positive ions depending on whether they lose or gain electrons to achieve the stable octet. If an atom loses electrons then it would have a positive charge (cation) and if the atom gains electrons then it would become negatively charged (anion).

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If a 32.5 mL of a 15.1 M HCl solution was diluted to 3.25 L with water, what is the final concentration?

user100 [1]

Answer:

The final concentration is 0,151 M.

Explanation:

A dilution consists of the decrease of concentration of a substance in a solution (the higher the volume of the solvent, the lower the concentration).

We convert the unit of volume in L into ml: 3,25 x 1000= 3250 ml

We use the formula for dilutions:

C1 x V1 = C2 x V2

C2= (C1 xV1)/V2

C2= (32, 5 ml x 15, 1 M)/ 3250 ml

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3 years ago

From his experiments, J. J. Thomson concluded that cathode ray particles can move at very fast speeds. cathode ray particles can

Semenov [28]

Answer:atoms contain small negatively charged particles that are called electrons

Explanation:

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