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The two primary substances associated with healthy bones are both Calcium and Vitamin D.
Two or more substances that are not chemically combined make up a mixture.
Urine and Sweat
Silicon and oxygen
The organic part of bone is mainly made up of two parts. 1 is collagen,a fibrous tissue & ground substances which is made up of proteoglyans.
1 nitrogen 3 Hydrogen
liquid and powder
Two or more different atoms make a chemical compound.
The two main substances that make up a virus are nucleic acid (DNA or RNA) and protein. When these substances are broken into smaller fragments, the nucleic acid fragments are called nucleotides, and the protein fragments are called amino acids.
YOu two bone hard, then he will leave because he is satisfied. The key is to bone hard as hell
water and carbon dioxide
water and carbon dioxide