Question

determine the element symbol, mass number, and charge for an atom or ion that has 49 neutrons, 38 protons, and 36 electrons. element symbol: mass number: charge:

Explanation:

Step1: Identify the element

The atomic number is equal to the number of protons. With 38 protons, the element is strontium, symbol Sr.

Step2: Calculate the mass number

The mass number is the sum of protons and neutrons. So, $49 + 38=87$.

Step3: Determine the charge

The charge is calculated by the difference between the number of protons and electrons. $38 - 36 = + 2$.

Answer:

element symbol: Sr
mass number: 87
charge: +2