Question

What is the arrow pointing to?

The figure shows a solution of different molecules. Some of them consist of two small atoms attached to a bigger one. Some are negatively charged, and consist of one big atom attached to the small one. There are also small positively charged atoms, which are pointed by an arrow.
A. hydrogen ion
B. hydronium ion
C. electron
D. hydroxide ion
E. water molecule

Answer 1

Option A

Step-by-step explanation:

Hi, this is why A is the correct option:

Hydronium ion (
`H_3O^+`), water (
`H_2O` ) and hydroxide ion (
`OH^-`) are all molecules formed by two or more atoms.

So the correct answer is between hydrogen ion and electron. Well the diference is that the first one is positively charged (as the atom pointed) and the second one is negatively charged.

By elimination of the other options, the right one is option A

Answer 2

A

Step-by-step explanation:

Electrons and the hydroxide ion are negatively charged and are also not atoms.

The hydronium ion and the water molecule are both molecules, not atoms.

By process of elimination, the correct answer is A. The hydrogen ion is an atom and is also positively charged.