Science - 2018-19

6.4 a-c, g - Atoms, Elements, & Compounds

The student will investigate and understand that all matter is made up of atoms. Key concepts include
a) atoms consist of particles, including electrons, protons, and neutrons;
b) atoms of a particular element are alike but are different from atoms of other elements;
c) elements may be represented by chemical symbols;and
g) a limited number of elements comprise the largest portion of the solid Earth, living matter, the oceans, and the atmosphere.

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.

  • I can identify elements from a model.
  • I can identify elements in a compound based on their symbols.
  • I can identify the origin of a soil sample based on its composition.


  • The basic structural components of a typical atom are electrons, protons, and neutrons. Protons and neutrons comprise the nucleus of an atom.
  • An element is a form of matter made up of one type of atom. The atoms of an element are basically alike, though the number of neutrons may vary.
  • The atoms of one element differ from those of another element in the number of protons.
  • Elements can be represented by chemical symbols.
  • A limited number of elements, including silicon, aluminum, iron, sodium, calcium, potassium, magnesium, hydrogen, oxygen, nitrogen, and carbon, form the largest portion of Earth's crust, living matter, the oceans, and the atmosphere.


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

a) create and interpret a simplified modern model of the structure of an atom.

b) compare and contrast the atomic structure of two different elements.

c) explain that elements are represented by symbols.

g) name some of the predominant elements found in the atmosphere, the oceans, living matter, and Earth’s crust.


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

Updated: Jun 29, 2018