%Mass
Ar C = 12 g/mol, Mr C₄H₁₀ = 58 g/mol, Ar H = 1 g/mol

or

Mental illnesses or emotional illness or silly things like eating or dancing
Answer: C
Explanation:
The one closest to the atomic center, there is a single 1s orbital that can hold 2 electrons. At the next energy level, there are four orbitals.
Answer:
The porpoise would hear its echo first because sound travels faster in water than in air. The bat would hear its echo first because the amplitude of sound waves ...
Explanation:
Answer:
Ability to be bent = Malleability
Identity = Physical Change
Electrical Current = Conductivity
Dissolve = Solubility
Color, Phase, or Hardness = Physical Property