Science - 2018-19

6.4 d-f - Bonding & Formulas

The student will investigate and understand that all matter is made up of atoms. Key concepts include

d) two or more atoms interact to form new substances, which are held together by electrical forces (bonds); and

e) compounds may be represented by chemical formulas.

f) chemical equations can be used to model chemical changes.

Bloom's Levels:  Analyze; Understand

Adopted: 2010


  • Atoms are the building blocks of matter.
  • Atoms can combine in a variety of ratios to create compounds, represented by chemical formulas.
  • Matter can undergo a variety of changes.
  • Changes in matter are accompanied by changes in energy and are represented by chemical equations.

  • I can model chemical reactions, such as the combustion of diesel in the school bus engine.
  • I can describe the compounds in my food and drinks.
  • I can identify and model chemical changes in my daily life, such as cooking food, combustion engines, and medications.


  • Two or more atoms of different elements may combine to form a compound.
  • Compounds can be represented by chemical formulas. Each different element in the compound is represented by its unique symbol. The number of each type of element in the compound (other than 1) is represented by a small number (the subscript) to the right of the element symbol.
  • Chemical equations can be used to model chemical changes, illustrating how elements become rearranged in a chemical reaction.


In order to meet this standard, it is expected that students will

e) identify the name and number of each element present in a simple molecule or compound, such as O2, H2O, CO2, or CaCO3.

f) model a simple chemical change with an equation and account for all atoms. Distinguish the types of elements and number of each element in the chemical equation. (Balancing equations will be further developed in Physical Science.)


atom, proton, neutron, electron, nucleus, atomic number, element, compound, matter, chemical equation, chemical change, physical change

Updated: Jun 29, 2018