Not inherently. There are a number of compounds capable of imparting a greenish color to a flame; some of them definitely are highly poisonous, while others are less so. (In large enough quantities, practically everything is "toxic".) Boric acid, for example, can be used to make flames burn green, and as long as you're using it in a well-ventilated area it should be safe enough.
A green flame is due probable to copper.
The color of barium in the flame test is pale-apple green.
Copper is the element responsible for the green flame produced in the Beilstein test. When a copper compound is heated in the presence of a flame, it emits a green color due to the presence of copper ions.
green
Burning copper chloride produces a green flame due to the presence of copper ions in the compound. The green color is a result of specific energy transitions within the copper ions when they are heated.
Green tree frogs are not poisonous to touch.
The flame test for nickel produces a blue-green color flame.
The green flame is likely due to the presence of copper in the ink used in the magazines. When copper is heated, it can produce a green flame.
The flame color of CuCl2 is blue-green. This color is often observed when copper compounds are heated in a flame.
no
Boron is the element that gives a green flame when it is heated.
When phosphorus burns, it produces a pale green flame.
Chlorine gas itself does not emit a colored flame when subjected to a flame test. Instead, it will impart a green color to the flame when a sample containing chlorine (such as a chloride compound) is included in the flame test.
Cupric nitrate typically produces a blue-green flame when burned.
The flame color of boron in the flame test is bright green.
Copper gives off a green flame when burned. So, green.
No. Beetles don't bite and they are not poisonous.