Answer:
Galena
Explanation:
Galena usually occurs in cubic crystals. If you hit a specimen of galena with a hammer it will shatter into small perfect cubic crystals. It has a metallic luster and a black to dark gray color and streak. Galena has a hardness of about 2.5 on the Mohs hardness scale which is about as hard as your fingernail.
Answer:
1.) Noncommunicable disease progress monitor. 2.) A global brief on Hypertension. 3.) Population sodium reduction strategies.
Explanation:
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