Answer:
I think its iron(II) oxide
Explanation:
The substance is black but when it's mixed with water it turns green solution so when mixed with sodium Hydroxide it turns green
False
explanation
All of the elements with atomic numbers 1 to 92 can be found in nature, have stable or very long half-life isotopes, and are created as common products of the decay of uranium and thorium.
B. i took the test and got it right
Explanation:
element with atomic numbers 7 and 83 have 5 and 5 valence electrons
Of heating. Or when the lake is exposed to boil because of the temperature.
