1.1.1 Understanding atoms as the smallest part of an element

• What are atoms compared to in the analogy of LEGO bricks?

  Tiny LEGO bricks
• Give an example of a molecule formed by two or more atoms.

  Water (H₂O)
• How many electron orbits are shown in the Bohr atomic model of a nitrogen atom in the image?

  Two
• Atoms are the fundamental building blocks of all matter in the universe

  True
• Molecules are formed by chemically bonding multiple atoms together

  True
• What is located in the center of an atom?

  Nucleus
• Match the term with its definition:

  Atom ↔️ Smallest particle of an element

  Molecule ↔️ Two or more atoms joined
• Electrons have a negative charge

  True
• What are molecules made of in the LEGO analogy?

  Multiple LEGO bricks
• What surrounds the nucleus in an atom?

  Electron shells
• What are the three subatomic particles shown in the diagram of an atom?

  Proton, neutron, electron
• Nitrogen has 2 electrons in its first shell and 5 in the outer shell

  True
• What are the positively charged particles in the nucleus of a nitrogen atom called?

  Protons
• Match the subatomic particle with its charge:

  Proton ↔️ Positive

  Neutron ↔️ Neutral

  Electron ↔️ Negative
• Match the subatomic particle with its charge:

  Proton ↔️ Positive

  Neutron ↔️ Neutral

  Electron ↔️ Negative
• Protons and neutrons are located in the nucleus of an atom

  True
• What determines the chemical properties of an element?

  Atomic number
• Protons have a positive charge and are located in the nucleus

  True
• The proton has a positive charge and is located in the nucleus of an atom.

  True
• Electrons have a negative charge and are located in electron shells

  True
• The electrons in a nitrogen atom move in fixed orbits around the nucleus.

  True
• Arrange the following parts of an atom from the center outwards:

  1️⃣ Nucleus (protons and neutrons)

  2️⃣ Electron shells
• What are atoms referred to as in the context of matter?

  Smallest building blocks
• Neutrons in the nucleus have a neutral charge

  True
• What is the central part of an atom called?

  Nucleus
• The atomic number of an element is equal to the number of protons in its nucleus.

  True
• How many protons does nitrogen have?

  7
• Atoms are single, indivisible units of matter.


  True
• The noble gases are chemically reactive and form compounds easily.

  False
• Different numbers of protons create different elements.

  True
• Order the following atomic properties based on their relevance in the periodic table:

  1️⃣ Atomic number

  2️⃣ Atomic weight

  3️⃣ Chemical symbol
• What is the atomic number of oxygen?

  8
• Which element has the highest atomic number in the periodic table shown?

  Og
• Which element has the chemical symbol Ne?

  Neon
• What is the chemical symbol for hydrogen?

  H
• What is the atomic weight of lithium?

  6.941
• What is the atomic number of hydrogen?

  1
• Where are elements organized according to their atomic number?

  Periodic table
• What is an atom often compared to in terms of its building block nature?

  A tiny LEGO brick
• In which period and group is carbon located?

  Period 2, Group 14