Question

1. what is the isotope name for a nucleus with 78 protons and 182 nucleons?
2. what is the symbol for the element with atomic #52?
3. what is the atomic number for tin?
4. what subatomic particles are in a radium ion if it has a mass number of 223?
5. what is the name of the element with the symbol cl?
6. what subatomic particles are in an uncharged isotope with atomic number 18 and 40 nucleons?

Explanation:

Step1: Identify element by protons

The element with 78 protons is platinum. The mass - number is 182, so it's platinum - 182.

Step2: Use periodic table for atomic number

The element with atomic number 52 is tellurium, symbol Te.

Step3: Find tin on periodic table

Tin has an atomic number of 50.

Step4: Determine subatomic particles for radium

Radium has an atomic number of 88. Neutrons = Mass number - Atomic number = 223 - 88 = 135. Electron number depends on charge.

Step5: Identify element by symbol

The symbol Cl represents chlorine.

Step6: Calculate subatomic particles for isotope

Protons equal the atomic number (18). Neutrons = 40 - 18 = 22. For an uncharged isotope, electrons equal protons (18).

Answer:

1. Platinum - 182
2. Te
3. 50
4. # p⁺: 88, # n⁰: 135, # e⁻: Varies depending on the ion charge (usually 88 for neutral or adjusted based on charge)
5. Chlorine
6. # p⁺: 18, # n⁰: 22, # e⁻: 18