5. Which three of the following elements have atoms with four energy levels in then ground state? 5) K 1) Zn 2) P 3) As 4) F

Question

5. Which three of the following elements have atoms with four energy levels in then ground state? 5) K 1) Zn 2) P 3) As 4) F

Answer 1

5) K, 1) Zn, 3) As

Answer 2

## Step 1The problem asks us to identify the three elements whose atoms have four energy levels in their ground state. The energy levels of an atom are determined by the number of electron shells it has. The first energy level can hold up to 2 electrons, the second can hold up to 8, the third can hold up to 18, and the fourth can hold up to 32. ## Step 2The atomic number of an element corresponds to the number of protons in its nucleus, and in a neutral atom, the number of protons equals the number of electrons. Therefore, the atomic number of an element can give us an idea of how many electron shells it has.## Step 3Looking at the options, we can see that Zinc (Zn) has an atomic number of 30, which means it has 4 electron shells. Phosphorus (P) has an atomic number of 15, which means it has 3 electron shells. Arsenic (As) has an atomic number of 33, which means it has 4 electron shells. Fluorine (F) has an atomic number of 9, which means it has 2 electron shells. Potassium (K) has an atomic number of 19, which means it has 4 electron shells.## Step 4Therefore, the three elements whose atoms have four energy levels in their ground state are Zinc (Zn), Arsenic (As), and Potassium (K).

Вопрос

5. Which three of the following elements have atoms with four energy levels in then ground state? 5) K 1) Zn 2) P 3) As 4) F

Решения

Ответ

Объяснение