Yes a transfomer can convert mechanical energy to electric energy
The atomic number is the total number of protons in the nucleus. The mass number is the total number of particles in the nucleus. That includes the neutrons and the protons. So, the atomic number is 31. When you look at the element on the periodic table with a designated atomic number of 31, that would be Gallium, with a symbol of Ga. Mass number is 31 + 36 = 67. So, the answer is A.
Answer:
Each principal energy level has one sublevel containing one orbital, an s orbital, that can contain a maximum of two electrons.
Explanation:
Answer:
The lower the hydrogen ion concentration, the higher the pH.
Step-by-step explanation:
This effect comes from the definition of pH:
pH = -log[H₃O⁺]
Consider two solutions.
Solution A has [H₃O⁺] = 10⁻¹ mol·L⁻¹; Solution B has [H₃O⁺] = 10⁻¹⁰ mol·L⁻¹.
Solution B has the <em>lower [H₃O⁺]</em>.
Now, take the logarithm of each concentration.
Solution A: log[H₃O⁺] = log10⁻¹ = -1; Solution B: log[H₃O⁺] = log10⁻¹⁰ = -10
Solution B still has the <em>lower value</em>.
However, pH is the <em>negative</em> logarithm.
When we take negative logarithms, we get
Solution A: pH = 1; Solution B: pH = 10
Solution B has the lower [H₃O⁺], but the higher pH.
The lower the hydrogen ion concentration, the higher the pH.
Either covalent compounds are neutral, covalent compounds share electrons