The major symptoms of chronic mercury poisoning in children, according to the Centers for Disease Control:
- Tremors in extremities.
- Impaired motor control, manifesting as difficulty walking.
- Speech impairment.
- Personality changes (described in the study as "characterized by irritability,
excessive shyness, confidence loss, and nervousness").
- Memory loss.
- Impaired cognitive performance.
I suppose the personality changes could include the list on that image, but it entirely omits the neuromuscular problems, which are at least as prominent. It also lumps together two very different things under "loss of speech": mercury poisoning's speech impairment shows up as difficulty forming sounds, while autism's is at the level of words and sentences.
In short, to get that list of "symptoms of mercury poisoning in children", you need to ignore about half the symptoms, and distort the other half.