Atomic Structure
Elements
Compounds
Mixture
Periodic Table
100

The smallest particle of matter

atom

100

How many elements are known today?

118

100

What is a compound?

Two or more DIFFERENT elements chemically combined

100

What are the two different types of mixtures?

Heterogeneous and heterogeneous

100

What does the periodic table organize?

The elements

200

Name the 3 subatomic particles of an atom and their charges

proton is positive

neutron is neutral

electron is negative

200

Which element makes up 78% of our atmosphere?

Nitrogen

200

Give 1 example of a compound and tell the elements that are in it.

H2O - Hydrogen, Oxygen

NaCl- Sodium, Chlorine

CO2 - Carbon, Oxygen

C6H12O6 - Carbon, Hydrogen, Oxygen

etc...

200

Name two ways that mixtures can be separated

Filtration

Simple Distillation

Evaporation

Sifting

Magnetic Attraction

200
What determines the order of the elements in the periodic table?

Atomic number or number of protons

300

Which of the subatomic particles has the smallest mass?

Electron (1/1850 amu)

300

What is the definition of an element?

A pure substance made of only one type of atom

300

In CH4 (methane), how many total atoms?

5

C- 1

H - 4

300

How would you separate a saltwater solution?

Evaporation

300

What are the vertical columns called?

Groups

400

If the atomic mass of an element is 10 and the atomic number is 4, how many neutrons are in the element? 

6 neutrons; (10 - 4 = 6)

400

Can water be found on the periodic table?   Why or why not?

No because it is NOT an element; it is a compound made up of 2 different elements, Hydrogen and Oxygen.  

400

What is the 2 in H2O called?  What does it tell us?

subscript - tells how many Hydrogen atoms are in the compound

400

How is a homogeneous mixture different from a heterogeneous mixture?

Homogeneous are evenly blended

Heterogeneous are not evenly blended

400

What are the horizontal rows called?

Periods

500

How do you calculate the number of neutrons? How many neutrons does Hydrogen have?

Atomic mass - Atomic number = # Neutrons

Hydrogen has 0 neutrons

500

How are elements and compounds DIFFERENT? How are they ALIKE?

Answers will vary:

Elements and compounds are both pure substances.

Elements are made up of all the SAME atoms; Compounds are made up of DIFFERENT atoms.

500

How many elements are in the following compound?

CaCO3  Name them.

3 elements

Calcium

Carbon

Oxygen

500
What type of homogeneous mixture involves dissolving a solute in a solvent (Ex. sugar and water)

solution

500

If an element is in Period 4, what does that tell us about the element?

It has 4 energy levels

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