Understanding atoms as the smallest part of an element

• Atoms of different elements are identical.

  False
• What is the name of the outermost layer of an atom?

  Electron shell
• What are the main components of an atom?

  • Electron shell
  • Nucleus
  • Protons
  • Neutrons
• What is the name of the positively charged particle in an atom?

  Proton
• What are atoms considered in relation to elements?

  Smallest particles
• What are the main components of an atom?

  • Electron shell
  • Nucleus
  • Protons
  • Neutrons
• What is the charge of a neutron?

  0
• What represents hydrogen on the periodic table?

  H
• What type of atom does the element Hydrogen have?

  Hydrogen atom
• What is an atom defined as in chemistry?

  Smallest unit of an element
• Match the element with its chemical symbol:

  Hydrogen ↔️ H

  Oxygen ↔️ O

  Carbon ↔️ C

  Iron ↔️ Fe
• Why are atoms considered fundamental building blocks of matter?

  They form elements
• What is the name of the central part of an atom?

  Nucleus
• What is the name of the neutral particle in an atom?

  Neutron
• How do the relative masses of the main atomic particles compare?

  • Protons and neutrons have approximately the same mass
  • Electrons have a much smaller mass compared to protons and neutrons
• What is the central part of an atom called?

  Nucleus
• How do the charges of the main atomic particles relate to each other?

  • Protons have a positive charge
  • Electrons have a negative charge
  • Neutrons have no charge (are neutral)
• Which particles contribute most to an atom's mass?

  Protons and neutrons
• What is the name of the positively charged particle in an atom?

  Proton
• Electrons have a positive charge.

  False
• What is the name of the outermost layer of an atom?

  Electron shell
• What are the three subatomic particles in an atom?

  Proton, neutron, electron
• How are the main atomic particles arranged within an atom?

  • Electrons orbit the nucleus in shells
  • Protons and neutrons are contained within the nucleus
• How do the charges of the main atomic particles relate to each other?

  • Protons have a positive charge
  • Electrons have a negative charge
  • Neutrons have no charge (are neutral)
• How are the main atomic particles arranged within an atom?

  • Electrons orbit the nucleus in shells
  • Protons and neutrons are contained within the nucleus
• What is the role of electrons in chemical bonding?

  Shared or transferred
• What is the name of the central part of an atom?

  Nucleus
• What is the approximate atomic mass of carbon if it has 6 protons and 6 neutrons?

  12 amu
• How many oxygen atoms are in a carbon dioxide molecule?

  2
• How many fluorine atoms are in a fluorine molecule?

  2
• An element can be broken down into simpler substances by chemical means.

  False
• Electrons contribute significantly to the atomic mass of an atom.

  False
• What are the steps in the formation of a carbon dioxide molecule?

  • 1 carbon atom
  • 2 oxygen atoms
  • Carbon atom forms 2 covalent bonds with the oxygen atoms
  • This results in a stable carbon dioxide molecule
• How does the structure of a hydrogen molecule differ from a carbon dioxide molecule?

  Hydrogen has 2 hydrogen atoms bonded together, while carbon dioxide has 1 carbon atom bonded to 2 oxygen atoms
• What are the steps in the formation of a fluorine molecule?

  • 2 fluorine atoms
  • Atoms share their electrons to form a covalent bond
  • This results in a stable fluorine molecule
• What is an element defined as?

  A pure substance
• What is the charge of the Mg2+ ion shown in the image?

  Positive 2
• In the image, which type of particle has a positive or negative electrical charge?

  Ions
• What is the smallest unit of an element that can exist independently?

  Atom
• What charge does the complex of Oxygen and Hydrogen have in the image?


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