Question

1. radium : element; _________: compound
A. air C. mineral oil
B. carbon monoxide D. phosphorus
2. __________ : metal; nitrogen : nonmetal
A. chlorine C. oxygen
B. hydrogen D. zinc
3. Ca : calcium; __________: phosphorus
A. K C. P
B. Ka D. Po
4. iodine : thyroid gland; _____________: hemoglobin
A. iron C. nitrogen
B. magnesium D. sodium
5. _______: gold ; Cu : copper
A. Ag C. Gd
B. Au D. Pb

Answer 1

Answer:

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Answer 2

Answer:

air

Explanation:

air is mixture of many gases so it is a compound