Question

current attempt in progress
an unknown element contains 33 protons, 36 electrons, and has mass number 76. answer the following questions:
a. the atomic number of this element is
b. the name of this element is and its symbol is
c. this element contains neutrons.
d. the charge on this ion is , making it a(n)
e. write the symbolic notation for the neutral form of this element.

Explanation:

Step1: Recall atomic number definition

The atomic number is equal to the number of protons. Given 33 protons, the atomic number is 33.

Step2: Identify element from atomic number

Looking at the periodic - table, the element with atomic number 33 is Arsenic, symbol As.

Step3: Calculate number of neutrons

The mass number is the sum of protons and neutrons. So, the number of neutrons = mass number - number of protons. Given mass number = 76 and number of protons = 33, neutrons = 76 - 33=43.

Step4: Determine ion charge

The charge of an ion is given by the difference between the number of protons and electrons. Charge = number of protons - number of electrons. Given 33 protons and 36 electrons, charge = 33 - 36=-3. A negative - charged ion is an anion.

Step5: Write symbolic notation for neutral form

For a neutral atom, the number of protons = number of electrons. The symbolic notation for an element is $_{Z}^{A}X$, where Z is the atomic number, A is the mass number, and X is the element symbol. For Arsenic with Z = 33 and A = 76, the symbolic notation is $_{33}^{76}As$.

Answer:

a. 33
b. Arsenic, As
c. 43
d. - 3, anion
e. $_{33}^{76}As$