Question

lithium has 3 protons, 4 neutrons, and 3 electrons. an element with which of these particles would have properties most similar to lithium? (1 point)

an element with 12 protons, 12 neutrons, and 12 electrons.

an element with 4 protons, 4 neutrons, and 3 electrons.

an element with 10 protons, 12 neutrons, and 10 electrons.

an element with 11 protons, 11 neutrons, and 11 electrons.

Explanation:

Step1: Recall periodic - table trends

Elements in the same group have similar properties, and the number of valence electrons determines the group. The number of protons defines the element.

Step2: Determine lithium's group

Lithium (Li) has 3 protons, atomic number 3. Its electron - configuration is 2,1. It is in Group 1 of the periodic table.

Step3: Analyze each option

• Option 1: Element with 12 protons is magnesium (Mg), electron - configuration 2,8,2. In Group 2.
• Option 2: Element with 4 protons is beryllium (Be), electron - configuration 2,2. In Group 2.
• Option 3: Element with 10 protons is neon (Ne), electron - configuration 2,8. In Group 18.
• Option 4: Element with 11 protons is sodium (Na), electron - configuration 2,8,1. In Group 1.

Answer:

An element with 11 protons, 11 neutrons, and 11 electrons.