An atom that has 13 protons and 15 neutrons is isotope of Aluminium (answer C)
<u><em>Explanation</em></u>
- Isotope is a form of the same element with the equal number of protons but difference number of neutrons in their nuclei.
- In other words isotope has the same atomic number but different mass number.
- Atomic number of a element is determined by number of protons of an element.
- from the periodic table Aluminum in atomic number 13 therefore it has 13 protons <em>therefore an atom that has 13 protons and 15 neutrons is a isotope of Aluminium. </em>
1 false
2 true
6 true
7 true
8 true
9 true
Answer:
100 HZ 1,000 HZ 10,000 HZ there you go :)
Answer:
The higher the hydronium ion concentration of a solution, the <u>lowe</u>r its pH.
Explanation:
Consider a <em>high</em> hydronium concentration, 1 mol·L⁻¹.
pH = -log[H₃O⁺] = -log1 = 0
Now consider a <em>low</em> hydronium ion concentration, 10⁻¹⁴ mol·L⁻¹.
pH = -log(10⁻¹⁴) = 14
Thus, a <em>high</em> hydronium ion concentration means a <em>low </em>pH.