Match the following questions with the correct answer choice.

Question

Diagram: 3 protons, 4 neutrons, 3 electrons

What is the mass number of this atom?:

How many valence electrons does this atom have?

How many energy levels does this atom have?

What is the atomic number of this atom?

What period of the periodic table is it in?

What group in the periodic table is this atom in?

Choices: 2,4,8,7,1,3,5,6

Chose the correct answers

Answer 1

Based on the diagram provided, which describes an atom with 3 protons, 4 neutrons, and 3 electrons, let’s answer each question one by one.

1. What is the mass number of this atom?

   • The mass number is the sum of protons and neutrons.
   • Mass number = 3 protons + 4 neutrons = 7.

2. How many valence electrons does this atom have?

   • This atom has 3 electrons in total, and since it has 3 protons, it is likely Lithium (Li), which is in Group 1 (alkali metals) and has 1 valence electron.
   • So, the answer is 1.

3. How many energy levels does this atom have?

   • Lithium (Li) has 2 energy levels (shells); the first shell can hold 2 electrons and the second shell can hold the remaining electron.
   • Therefore, the answer is 2.

4. What is the atomic number of this atom?

   • The atomic number is equal to the number of protons. Here, it has 3 protons.
   • So, the answer is 3.

5. What period of the periodic table is it in?

   • Lithium (Li) is in Period 2 of the periodic table.
   • So, the answer is 2.

6. What group in the periodic table is this atom in?

   • Lithium (Li) is in Group 1 (alkali metals).
   • So, the answer is 1.

Thus, the correct matching of questions to answer choices based on the details given is:

1. What is the mass number of this atom? → 7
2. How many valence electrons does this atom have? → 1
3. How many energy levels does this atom have? → 2
4. What is the atomic number of this atom? → 3
5. What period of the periodic table is it in? → 2
6. What group in the periodic table is this atom in? → 1