Unit 1 Flashcards
Matter
States of matter
Matter: anything that has mass and takes up space
Solid
Liquid
Gas
Diff between physical and chemical changes and properties
Physical properties: describe matter how it exists Shape Color Size Temp
Chem : matter as it changes form (chemicaly) Change in chemical make up of item Cooking Burning Chemical reactions
Law of the conservation of mass
Mass is neither created or destroyed in a chemical reaction
Elements v compounds v pure substances
Mixtures ( homogenous v heterogeneous)
Pure substances : same physical and chemical properties throughout
Reped by chem formula
Mixture : matter with variable composition
More then one substance (physical)
Element : cannot be broken down into simpler pure substance
Compound : 2 or more elements
Alloy: homogeneous mixture of a base metal
Solution= homogeneous mixture
Metals v non metals v semimetals
Metals Solid room temp Shiney Conductor Heat well Malleable Ductile
Nonmetals Brittle Insulator Does not heat well No shiney sheets or wires Not all solid at room temp
Semi metals
Have properties of both
Sig fig rules 🤮
+- is to lowest place
*\ is lowest # sigfigs
Volume v area v density
Volume= lengths * widths * heights
M^3
1 ml = 1 cm^3
Area = length times width
M^2
Density = mass\volume
Fahrenheit to Celsius
C=(F-32) * 5/9
Celsius to Fahrenheit
F= (C*9/5)+32
Celsius to kelvin
Kelvin = C +273.15
Kelvin to Celsius
C=k-273.15
Isotope
Symbolic notation
Isotope - atoms of same element same proton but different neutrons
A/z X
A -atomic mass
Z- atomic number
X - symbol
Metals v metalloids v non-metals
Metals - left of zig zag
Non - right of zigzag
Semi - br si ge as at te
Transition and inner transition (metals location)
Representative
Rep elements 1A to 8a
Most common
Transitional are b group (1b to 8b)
Transitional are bottom two rows
Alkali metals
1A
Left column
