the number of protons in an atom is known as its atomic number. atoms that share the same atomic number are…

the number of protons in an atom is known as its atomic number. atoms that share the same atomic number are classified as the same chemical element. below is a model representing an atom of the chemical element lithium. proton neutron electron what is lithiums atomic number? which of the following models also represents a lithium atom?

the number of protons in an atom is known as its atomic number. atoms that share the same atomic number are classified as the same chemical element. below is a model representing an atom of the chemical element lithium. proton neutron electron what is lithiums atomic number? which of the following models also represents a lithium atom?

Answer

Explanation:

Step1: Count protons in lithium model

Count the yellow - colored particles (protons) in the given lithium atom model. There are 3 protons.

Step2: Recall atomic number definition

Atomic number is the number of protons. So lithium's atomic number is 3.

Step3: Identify correct lithium model

Check each model for 3 protons. The model with 3 yellow - colored particles (protons) is the correct one.

Answer:

3 The model with 3 protons (yellow particles in the nucleus) represents a lithium atom.