Answer:
C. Diamond
Explanation:
Talc is the softest and diamond is the hardest. Each mineral can scratch only those below it on the scale.
Answer: You need a control group because......
Explanation: You need a control group in order to study if there is any difference in behavior between two groups when an external stimulant is introduced.
He taught about That matter was made up of atoms
~Hope that helped!
~Izzy
<span>Majorly there are four types of inter molecular forces:
Permanent dipole (like in HCl or NaCl)
Ion dipole and Ion induced dipole
Hydrogen bonding
Van der Waals forces (Keesom, Debye, and London dispersion force)</span>
<span>A theory that has been proven true repeatedly over time and never disproven is called a law</span>
