106.7g + 0.25g + 0.195g = 107.145
since 106.7 has the most uncertainty(+- 0.1) the answer round off to 1 decimal place
final answer is 107.1 g
35.45 mL - 30.5mL = 4.95mL
most uncertainty is +-0.1ml so the anwer off to one decimal.
5.0 mL is the final answer
when adding and subtracting the measurements the answer carries the same number of decimal as the quantity carrying the fewest decimal places
12.04 x 5.4 = 65.016
12.04 has 4 significant figure , 5.4 has 2 significant figure . 5.4 has the fewest signicant figure therefore the final answer is 65
answer carries the same number of significant numbers as the factor with the fewest significant figures.
is the study of the composition structure and property of matter and the reactions that they undergo
= anything that has mass and occupies space .
= it is made up of element
a systematic way of observing experimenting and solving problems
a broad generalization that explains a body of facts or phenomena
C = K - 273.15
C = K -273.15
F = (C +32) 9/5
32 fluid ounces
the amount of mass per unit volume.
mixtures and pure substance
char. of substance that can be observed w/o changing the substance.
using a funnel and filter. ex. brewing coffee.
He hypothesized that all matter (plus space and time) is composed of tiny indestructible units, called atoms.
First, Elements are made of the smallest particles called atoms.
Second, all atoms of a given element have the same mass and other properties that distinguish them from the atoms of other elements.
Third, atoms combine in simple, whole #s reason to form compound.
formulated a periodic table in 1869. Elements were grouped with the same characteristics. only about 60 elements were known at the time, Dmitri Mendeleev left blanks where elements should go.
When an atom does not have the same number of protons and neutrons, it is called an isotope.
Number of Protons = Atomic Number = 36
Number of Electrons = Number of Protons = Atomic Number = 36
Number of Neutrons = Mass Number - Atomic Number = 84 - 36 = 48
Protons, neutrons, and electrons are the three main subatomic particles found in an atom.
Protons have a positive (+) charge
Neutrons have no electrical charge.