Science

• An atom is the smallest unit of matter that retains the properties of an element.
• Atoms are made of subatomic particals
• Atoms consist of protons and neutrons in the nucleus and electrons orbiting the nucleus.
• Protons have a positive charge, neutrons have no charge and electrons have a negative charge.
• The number of protons determines which element it is.
• The amount of protons and electrons are the same in an atom of an element.
• To determine the amount of neutrons in an element, take the element's atomic mass number on the periodic table and subtract the atomic number (amount of protons).
• What is the first element on the periodic table?

  Hydrogen
• What is the symbol for Lithium on the periodic table

  Li
• What is the 6th element on the periodic table?

  Carbon
• How many protons are in the element Boron?

  5
• What is the symbol for the 12th element of the periodic table?

  Mg