Answer:
I think it's Trinitrogen Pentaseleniumide
Explanation:
Tri - three
Penta - five
Second element ends with -ide
Answer:
Be careful about when to use capital letters. For example, CO means a molecule of carbon monoxide but Co is the symbol for cobalt
Explanation:
Copper II sulfate solution is blue.
3
Let me know if you need/want an explanation
Answer: option C) Na, Mg, K
Explanation:
Similar chemical properties are expressed by elements found in the same or close groups. There are Seven (7) groups in the Periodic table.
Of all the options, ONLY sodium Na, Magnesium Mg, and Potassium K, are located in closely together with SODIUM and MAGNESIUM being in the Same period, while SODIUM and POTASSIUM are placed in the same Group 1.
Therefore, Na, My, and K are most similar in chemical properties