Elements and the Periodic Table
The horizontal rows on the PTE are called
Periods.....Pooh
Matter is classified into ____ categories. ______ and _____.
Two
Pure Substance and Mixtures
We study Chemistry using______.
The Scientific Method
A unit of measurement that quantifies particles and molecules.
475 Hm is equal to _______ mm.
47500000 mm
The are ____ categories on the Periodic Table.
Eight.
Alkali Metals, Alkaline earth metals, Transition Metals, nonmetals, Halogens, Noble Gases, Lanthanides, Actinides
Solutions can be classified as _______ or _______.
Heterogenous or Homogenous.
The Independent Variable is
The manipulated or changed variable
To convert grams to moles you use
A conversion factor
We write really big or really small numbers using _____.
Scientific Notation
The Seven Diatomic Molecules are
Br2, I2, N2, H2, Cl2, O2, F2
BrINHClOF
I Have No Clever Or Bright Friends
The relation between temperature and particle motion is ___________.
Directly Proportional
The six steps of the Scientific Method are ______.
1. Observation 4. Conclusion
2. Hypothesis 5. Develop Theories
3. Experimentation 6. Scientific Law
A mole is ________ particles.
6.02 X 1023
The name of the underlined element is_________.
PbO2
Lead
Metalloids have_________.
Characteristics of both metals and nonmetals depending on the conditions.
_______ could affect the density of water.
Temperature
It is important to only change one variable at a time during an experiment because __________.
If you change more than one variable, you can’t be sure which variable is responsible for your results. If you only change one variable, your results are more certain.
There are ______ molecules in a 0.28 moles of carbon dioxide (CO2).
1.686 X 1023 molecules
Period 18 is very ______ and are called ______.
Unreactive
Noble Gases
Three ways that elements are organized in the periodic table are
Groups
Periods
Metallic Character
Atomic Number
The group number, period, and symbol for Silver are _____, ______, and ______.
11, 5, Ag
If the evidence from an experiment shows a hypothesis is correct, and the hypothesis has 100% repeatability by scientists all over the world, it can become a(n) _____.
Theory
There are _____atoms in a 3.56 g sample of Cu.
3.37 x 1022 Cu atoms
The mass of a piece of copper is 17.4 g. and the density of copper is 8.96 g/mL. The volume is _________.
1.94 mL