Atoms and Periodic Table Mastery Quiz

What is the center of an atom called?

• Electron cloud

• Nucleus

• Proton

• Neutron

Which particles are found in the nucleus of an atom?

• Electrons and protons

• Electrons and neutrons

• Protons and neutrons

• Protons, neutrons, and electrons

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of electrons in the outside energy level

• The total number of protons and neutrons in the nucleus

• The total number of particles in an atom

How is the atomic mass of an element calculated?

• By adding the number of protons and electrons

• By adding the number of protons and neutrons

• By counting the number of electrons

• By subtracting the number of neutrons from the number of protons

What are valence electrons?

• Electrons in the first energy level

• Electrons that are on the outer energy level.

• Electrons in the nucleus

• The total number of electrons in an atom

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Which element has an atomic number of 8?

• Hydrogen

• Helium

• Oxygen

• Nitrogen

How many valence electrons does chlorine have?

• 5

• 6

• 7

• 8

What is the term for elements in the same vertical column of the periodic table?

• Periods

• Groups

• Clusters

• Series

Which of the following elements is a metalloid?

• Boron

• Carbon

• Nitrogen

• Oxygen

What is the area around the center of an atom called?

• Electron cloud

• Nucleus

• Proton

• Neutron