Notify the appropriate authority
Pure silver is a single substance, an element. All its particles are silver atoms. That said, it is rare to encounter pure silver. For coinage and jewellery it is usually alloyed, often with copper, to make it harder.
It should be a "pure" substance, but its really an alloy.
urine
The state of the substance, the color of it and the odor (should be careful and keep the distance, otherwise may cause irritations or hazard) can be tested without altering the substance.
Which one of these is a possible indicator of a suspicious letter or package
Notify the appropriate authority
because the think he is suspicious
snow
no
If you encounter this, it goes without saying to run as fast as you can.
become suspicious.
We want phrases to describe suspicious not sentence
It depends on the substance.
run away
You should contact your card issuer to report the incident.
We say "acting suspicious" to describe someone's behavior or actions that seem questionable or cause concern. On the other hand, "looking suspicious" may refer to someone's appearance that suggests potential wrongdoing, but the more common phrase is "acting suspicious."
If you have evidence or reason to be suspicious of something, then keep a close eye on him. It is hard to give a good answer unless I know what you are suspicious of. If you are just suspicious without evidence, then you need to trust him. Get counceling if you need to. I have seen 1 marraige fall apart simply because the husband never trusted the wife.