AtomsAtoms

Journal 41) Copy the standards (page 118) 8.3. with a . 8.7. with a. b. and c.

Class discussion will follow: think about what you already know about atoms and the periodic table

Journal 41) Copy the standards (page 118) 8.3. with a . 8.7. with a. b. and c.

Class discussion will follow: think about what you already know about atoms and the periodic table

Grade: It’s a Gas LabGrade: It’s a Gas Lab

Hypothesis (4 pts)

Charts completed (16 pts)

Questions (10 pts)

Conclusion (5 pts)

Total (35 pts) (2 bonus pts for typed)

Hypothesis (4 pts)

Charts completed (16 pts)

Questions (10 pts)

Conclusion (5 pts)

Total (35 pts) (2 bonus pts for typed)

Review questions(Everyone at the table should know the

answer!)

Review questions(Everyone at the table should know the

answer!)

Groups of 2 or more atoms held together by chemical bonds are (elements, molecules, particles, or electrons)

When elements are chemically combined in a set ratio they form (molecules, matter, elements, or compounds)

Groups of 2 or more atoms held together by chemical bonds are (elements, molecules, particles, or electrons)

When elements are chemically combined in a set ratio they form (molecules, matter, elements, or compounds)

Review questionsReview questions

Which of the following is an example of an element? (copper, rust, concrete, water)

2 compounds with different properties are

C and O H and O CO and CO2

Cl and Ar

Which of the following is an example of an element? (copper, rust, concrete, water)

2 compounds with different properties are

C and O H and O CO and CO2

Cl and Ar

Atomic TheoryAtomic Theory

Copy underlined names on the left side of your page

Democritus (Greek philosopher: matter made of small pieces called atomos - uncuttable)

Copy underlined names on the left side of your page

Democritus (Greek philosopher: matter made of small pieces called atomos - uncuttable)

Dalton (English chemist)Dalton (English chemist)

Thomson (English scientist)

Atoms have negative charged electrons on theoutside of positive charged sphere

Thomson (English scientist)

Atoms have negative charged electrons on theoutside of positive charged sphere

Rutherford (experiments lead him to believe atoms are mostlyempty space with a positively charged nucleus)

If the nucleus was thesize of a dime, how far away would the atom’s edge be?

1)Make a prediction

Rutherford (experiments lead him to believe atoms are mostlyempty space with a positively charged nucleus)

If the nucleus was thesize of a dime, how far away would the atom’s edge be?

1)Make a prediction

The diameter of an atom can be 100,000 times the size of the nucleus.

1) Measure the diameter of a dime in millimeters

2) Multiple by 100,000

3) Change units to meters by dividing by 1,000

4) Change units to kilometers by dividing by 1,000

5) Multiply by 0.6 to get miles

How Far Away?

How Big is it?

Make the smallest dot possible on your page

It represents a speck of dust

How many atoms can fit in your speck of dust?

There are about 1 million billion atoms in a speck of dust!

1,000,000 X 1,000,000,000

That’s 1,000,000,000,000,000 atoms

Modern Atomic modelModern Atomic model

Copy the key terms on left side of page

Copy the key terms on left side of page

1) Atom 2) Nucleus 3) Proton

4) Neutron 5) Electron 6) Energy Level

7) Atomic number 8) Isotope 9) Mass number

Definitions:Definitions:

1) The basic particle from which all elements are made

2) Center core of an atom3) Positively charged particle in

nucleus4) Particle in nucleus with no electric

charge5) Negatively charged particle outside

of nucleus

1) The basic particle from which all elements are made

2) Center core of an atom3) Positively charged particle in

nucleus4) Particle in nucleus with no electric

charge5) Negatively charged particle outside

of nucleus

6) Electron’s energy, related to distance from nucleus (shell / orbit / cloud)

7) Number of protons in atom (number on periodic table)

8) Atoms of same element with different numbers of neutrons

9) Sum of the protons and neutrons in the atom’s nucleus

6) Electron’s energy, related to distance from nucleus (shell / orbit / cloud)

7) Number of protons in atom (number on periodic table)

8) Atoms of same element with different numbers of neutrons

9) Sum of the protons and neutrons in the atom’s nucleus

Draw Lithium atomDraw Lithium atom

Label all parts, use at least half the page

Atomic number = 3Mass number = 7

Nucleus (protons and neutrons)

Electrons (2 in first energy level and 1 in second energy level)

Electrical charges

Label all parts, use at least half the page

Atomic number = 3Mass number = 7

Nucleus (protons and neutrons)

Electrons (2 in first energy level and 1 in second energy level)

Electrical charges