6.1 Atomic Structure

• Atoms are composed of a central nucleus and a cloud of electrons.


  True
• The number of protons determines the element, while the number of neutrons determines the isotope of that element
• Protons have a positive charge, neutrons are neutral, and electrons have a negative
• Neutrons have a neutral charge.

  True
• Match the subatomic particle with its properties:

  Proton ↔️ Positive charge, relative mass 1

  Neutron ↔️ Neutral charge, relative mass 1

  Electron ↔️ Negative charge, relative mass 1/1836
• What is the charge of a proton?

  Positive (+1)
• Where are protons and neutrons located in an atom?

  Nucleus
• Electrons orbit the nucleus in distinct energy levels or shells.


  True
• Isotopes of an element have the same number of protons but a different number of neutrons
• What are two isotopes of carbon?

  Carbon-12 and Carbon-14
• What is the charge of a sodium ion (Na⁺)?

  Positive (+1)
• Match the atomic feature with its description:

  Nucleus ↔️ Contains protons and neutrons

  Electrons ↔️ Orbit the nucleus in energy levels
• Protons have a relative mass of 1 and a positive charge.


  True
• The nucleus of an atom contains protons and neutrons.


  True
• Protons are positively charged particles located in the nucleus
• The relative mass of an electron is approximately 1/1836
• Neutrons have a neutral charge and a relative mass of 1.


  True
• Match the subatomic particle with its properties:

  Proton ↔️ Positive charge, mass of 1

  Neutron ↔️ Neutral charge, mass of 1

  Electron ↔️ Negative charge, mass of 1/1836
• Electrons possess a negative charge and a very small relative mass of approximately 1/1836
• What does atomic mass represent?

  Mass of protons and neutrons
• Atomic number is the number of protons in the nucleus.


  True
• Ions have a net positive or negative charge.


  True
• An atom is the smallest unit of an element that retains its chemical properties
• An atom is the smallest unit of an element that still retains its chemical properties
• The number of protons determines the isotope of an element.

  False
• Arrange the subatomic particles by their location in the atom:

  1️⃣ Protons in the nucleus

  2️⃣ Neutrons in the nucleus

  3️⃣ Electrons in orbitals
• The nucleus of an atom contains protons and neutrons
• Electrons have a relative mass of approximately 1/1836.


  True
• The central nucleus of an atom contains protons and neutrons
• Match the isotope with its neutron count:

  Carbon-12 ↔️ 6 neutrons

  Carbon-14 ↔️ 8 neutrons
• What is the difference between an atom and an ion?

  Charge due to electron gain/loss
• An oxygen atom (O) can gain two electrons to become an oxide ion (O²⁻).


  True