1.1.1 Subatomic Particles

• What is the basic unit of matter that retains the chemical properties of an element?

  Atom
• Protons are positively charged particles located in the nucleus
• Neutrons have a neutral charge and are located in the nucleus.
• Electrons are negatively charged particles that orbit the nucleus in shells
• What does the atomic number of an element represent?

  Number of protons
• Arrange the subatomic particles in order of their location within the atom, starting from the nucleus outwards.

  1️⃣ Protons

  2️⃣ Neutrons

  3️⃣ Electrons
• Hydrogen has an atomic number of 1 because it has one proton.
• Protons have a positive charge
• Neutrons are located in the nucleus and have a neutral charge.
• Electrons have a negative charge and orbit the nucleus in shells
• Which subatomic particle has a positive charge?

  Proton
• The charge of a neutron is neutral
• Electrons are located in shells outside the nucleus.
• What is the location of protons within an atom?

  Nucleus
• Neutrons are located in the nucleus
• Which subatomic particle orbits the nucleus in shells or energy levels?

  Electron
• Protons and neutrons have approximately the same mass.
• The charge of an electron is negative
• What is the charge of a proton?

  Positive
• Electrons orbit the nucleus in shells
• Which subatomic particle has a positive charge and is located in the nucleus?

  Proton
• Neutrons are neutral particles found in the nucleus.
• Where are electrons located within an atom?

  Shells
• Arrange the subatomic particles in order of their location within the atom, starting from the center.

  1️⃣ Protons

  2️⃣ Neutrons

  3️⃣ Electrons
• In what region of the atom are protons and neutrons located?

  Nucleus
• Electrons are negatively charged and orbit the nucleus in fixed paths.

  False
• Where are protons and neutrons located within an atom?

  In the nucleus
• Electrons are found in shells or energy levels
• Protons and neutrons are clustered together in the nucleus.
• What is the charge of a proton?

  Positive
• A neutron has a neutral charge
• An electron has a negative charge.
• Match each subatomic particle with its charge:

  Proton ↔️ Positive

  Neutron ↔️ Neutral

  Electron ↔️ Negative
• What is the approximate mass of a proton in kilograms?

  $1.67262 x 10^{ - 27}$
• Protons and neutrons are nearly 2000 times heavier than electrons.
• What is the basic unit of matter that retains the chemical properties of an element?

  Atom
• An atom consists of protons, neutrons, and electrons
• What is the charge of a proton?

  Positive
• A neutron has a neutral charge
• An electron has a negative charge and is located in the shells around the nucleus.