Atoms Exam 2024

Your first name

Your LAST name

Your class period

• 1st
• 3rd
• 4th
• 5th
• 6th

The diagram below shows a model of an atom. The model contains three different subatomic particles. Particles X and Y are inside the nucleus. Particle Z is outside the nucleus. Choose the statement that best describes the charges on the particles in this model.

• All of the particles have a negative charge.
• Both particles X and Z have a negative charge
• Particle Z has a positive charge
• Particle Z has a negative charge

A model of a Beryllium atom is shown below. What types of particles are found in the cloud or on the shells surrounding the atom's nucleus.

• Positively charged particles and negatively charged particles
• Negatively charged particles only
• Neutral particles and positively charged particles
• Positively charged particles only

A student prepared diagrams to model atoms of two elements. Atoms of which two elements are represented by these models?

• Oxygen, O, and Neon, Ne
• Fluorine, F, and Neon, Ne
• Silicon, Si, and Phosphorus, P
• Beryllium, Be and Boron, B

A model of an atom is shown below. An atom of which element is represented by this model?

• Boron, B
• Carbon, C
• Neon, Ne
• Sodium, Na

An atom of a certain element has 36 electrons and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom?

• 48
• 120
• 36
• None of the above

How many neutrons are in the nucleus of a Sodium atom with a mass number of 23?

• 11
• 23
• 12
• 35

Look at the model of an atom below. Identify the name of the element based on the model.

• Lithium
• Boron
• Carbon
• None of the above