Elements and Compounds
Where are elements found?
Elements are found in all matter
What periodic group contains several columns in the periodic table?
What is an Acid?
Molecule that produces hydrogen Ions when it is dissolved in water
What is a measurement?
A quantitative observation
What is Scientific Notation?
Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form
What is a compound?
A compound is composed of atoms of different elements
What periodic family is along the "stairstep" on the periodic table?
Metalloids
What is an Anion?
A negatively charged Ion
What is an uncertain Number?
A number estimated in a measurement
What determines if the decimal places moves to the left or right?
How are compounds broken down?
Compounds break down into elements through chemical changes
Which group is already balanced with Valence Electrons?
Noble gases
When an anion name ends in -ate , what does the acid name end in?
-ic
What is a Significant Figure?
Numbers recorded in a measurement
Convert 1.89 x 108 to decimal notation
189,000,000
Which elements create H20?
Hydrogen and Oxygen
What is atomic mass based off of?
The sum of the numbers of protons and neutrons in the nucleus
What is the chemical formula for Nitric Acid?
HNO₃
For division and multiplication what method do you use to get decimal notation?
Significant Figures
(9.62 x 10-7 ds2)
_____________
(6.12 x 106 mL)
1.57 x 10-13 dsmL
Which elements are liquid at room temperature?
Mercury and Bromine
Name 3 of the 9 families in the periodic table.
Alkali Metals
Alkaline Earth Metals
Transition Metals
Triels
Tetrels
Pnictogens
Chalcogens
Halogens
Noble Gases
Name this Acid HNO₂
Nitrous Acid
When calculating for scientific notation what process do you use?
Decimal Places
Convert this to Scientific Notation 12,000,000
1.2 x 107