Atoms and Elements

Pages E40- E43

Atom

• Define:

• Parts of an atom:

The basic unit of matter

•Nucleus - Center•Protons - positive•Neurons - neutral

•Electrons - negative

Define: • A substance made up of only 1 kind of

atom.

Periodic table:•A chart that organizes elements by similar properties•in order of increasing atomic number

Element

Periodic Table

Closer look!

Molecules

Define:Two or more atoms of the same element linked together

Compounds

• Define – a substance made of the atoms of two

or more different elements

• Examples -Water = H2O or Salt = NaCl

Metals

• Elements are classified by their _________________,

• About ¼ of elements are nonmetals.

Properties of Metals

• Luster• Ductile• Malleability• Conductor• Insulator

Luster

• What is luster?

• Why is gold used in jewelry?

Ductile

Definition:

Example of an element that is ductile:

Malleable

• Define:

• What is an example of a malleable element?

Conductors and Insulators

• Metals ________ , or transfer, electricity or heat.

• Non metals like wood, glass & plastics are _____________ and do not conduct electricity. – What are some everyday examples of

Insulators?

Brain Pop

• Brain pop metals• http://genesismission.jpl.nasa.gov/

educate/scimodule/UnderElem/UnderElem_pdf/TeachText.pdf

• http://www.chem4kids.com/files/elem_pertable.html

• http://library.thinkquest.org/3659/pertable/nonmetal.html