Question

7 how many protons are in an atom of radon? (0.5 points) enter your answer 8 a neutral atom of an element contains 66 electrons. which element is it? (0.5 points) enter your answer 9 an atom of an element contains 14 protons. which element is it? * (0.5 points) enter your answer

Explanation:

Step1: Recall atomic number concept

The number of protons in an atom is equal to its atomic number.

Step2: Find radon's atomic number

Radon (Rn) has an atomic number of 86. So, it has 86 protons.

Step3: For the second - question, use electron - proton equality in neutral atoms

In a neutral atom, the number of electrons is equal to the number of protons, which is equal to the atomic number. With 66 electrons, the atomic number is 66, and the element is Dysprosium (Dy).

Step4: For the third - question, identify element by atomic number

With 14 protons, the atomic number is 14, and the element is Silicon (Si).

Answer:

1. 86
2. Dysprosium
3. Silicon