Students will be able to:
-distinguish between protons, neutrons, and electrons.
-explain that atoms are the smallest unit of an element and are composed of subatomic particles.
-describe how the atomic theory was developed.
-describe the arrangement of the periodic table.
-review waves.
Students completed a set of questions on the atom as their bell ringer using the clickers:
1. In an atom, the number of protons equals the number of
a. nuclei. c. neutrons.
b. electrons. d. isotopes.
2. The atomic number of an element is based on the
a. mass of its nucleus.
b. number of electrons around its core.
c. number of protons in its nucleus.
d. number of neutrons in its nucleus.
3. From an element’s location in the periodic table, you can predict
a. its properties. c. its chemical symbol.
b. its chemical name. d. when it was discovered.
4. Which group contains the most elements?
a. metalloids c. metals
b. nonmetals d. transition elements
5. Which group of metals is so reactive that the metals are never found as
uncombined elements in nature?
uncombined elements in nature?
a. alkaline earth metals c. alkali metals
b. lanthanides d. transition metals
6. At room temperature, more than half of the nonmetal elements are
a. powders. c. liquids.
b. gases. d. solids.
7. Which of the following groups contains an element especially important to the chemistry of life?
a. the halogens c. the noble gases
b. the metalloids d. the carbon family
8. Which of these phrases best describes the general properties of metals?
a. highly reactive
b. malleable, ductile, good conductors
c. not easily corroded
d. dull and brittle
9. The elements that do not ordinarily form compounds are
a. elements in the carbon family.
b. metals.
c. halogens.
d. noble gases.
10 . In Ernest Rutherford’s gold foil experiment, most positively charged particles passed through the foil, but a few particles were deflected strongly. This result caused Rutherford to infer
a. that electrons move in orbits around the nucleus of an atom.
b. that an atom’s positive charge must be clustered in a tiny region in its center.
c. that electrons have almost no mass.
d. that an atom consists of negative charges scattered in a ball of positive charge.
Students then reviewed waves using a power point lesson.
Students took notes on the atomic model, creating a booklet with the information of the development of the atomic model from Democritus to the current electron cloud model.
There was no nightly home learning.