4.1.1 Subatomic Particles

• Protons have a positive charge and are located in the nucleus.
• What is the charge of a neutron?

  Neutral (0)
• Electrons have a negative charge and orbit the nucleus
• The number of protons in an atom determines its atomic number.
• Match the subatomic particle with its properties:

  Proton ↔️ +1 charge, 1 amu, nucleus

  Neutron ↔️ 0 charge, 1 amu, nucleus

  Electron ↔️ -1 charge, negligible mass, orbits nucleus
• Arrange the following components of an atom in order from smallest to largest mass:

  1️⃣ Electron

  2️⃣ Proton

  3️⃣ Neutron
• What is the center of an atom called?

  Nucleus
• Electrons are negatively charged particles that orbit the nucleus in shells.
• Protons have a positive charge and a mass of approximately 1 atomic mass unit
• Where are neutrons located in an atom?

  Nucleus
• Electrons have a negligible mass compared to protons and neutrons.
• What is the charge of a proton?

  +1
• Neutrons have a neutral charge and are found in the nucleus.
• What is the charge of a neutron?

  Neutral
• Neutrons have a mass of approximately 1 amu
• Neutrons are located in the nucleus of an atom.
• What subatomic particle has a negative charge?

  Electron
• Neutrons have a mass of approximately 1 amu
• Neutrons are found in the nucleus of an atom.
• What is the location of electrons in an atom?

  Outside the nucleus
• Neutrons have a mass of approximately 1 amu
• Neutrons are located in the nucleus of an atom.
• What is the charge of an electron?

  Negative
• The atomic number ($Z$) represents the number of protons
• Carbon-12 has 6 protons and 6 neutrons.
• What subatomic particle determines the atomic number of an element?

  Proton
• The nucleus of an atom contains protons and neutrons
• The number of protons in an atom determines its atomic number.
• What is the mass of a proton in atomic mass units?

  1 amu
• A neutron has a charge of 0
• An electron has a negligible mass compared to protons and neutrons.
• Which subatomic particle has a positive charge?

  Proton
• A neutron has a mass of approximately 1 amu
• Electrons orbit the nucleus in distinct shells.
• What is the charge of a proton?

  +1
• A neutron has a charge of 0
• An electron's mass is negligible compared to protons and neutrons.
• What is the atomic number of an element defined by?

  Number of protons
• Neutrons have a neutral charge and a mass of approximately 1 amu
• Neutrons are located in the nucleus of an atom.