Module 1 Flashcards
Define Matter
Has mass, occupy space & physical
What are the two ways matter is described?
- Physical
- Composition
Examples of physical state
Liquid, gas, solid
Examples of composition
Elements, mixture, compound
Define law of constant composition
Compounds are made of element in definite proportions
Define pure substances
Having fixed compositions
Define heterogenous mixture
Mixtures that don’t have the same composition through out(choc- chip cookie)
Define homogeneous mixture
Mixtures that are uniform throughout (salt water)
Define intensive properties (give examples
Do not depend on amount of sample(boiling point, color, temp.,luster, hardness )
Define extensive properties , give examples
Does depend on quantity of the sample (volume, mass , size, weight, length)
Define kinetic energy
Energy in motion
Define potential energy
Energy associated with/position or composition
Define thermal energy
Energy associated with/temperature of an object
Define law of conservation of energy
Energy is neither created nor destroyed
Define heterogeneous
Mixtures that don’t have the same composition throughout the appearances
Define Homeogenous mixture
Mixtures that are uniform throughout the appearance
Define Homeogenous mixture
Mixtures that are uniform throughout the appearance
Are homeogenous and heterogeneous, mixtures or pure substances ?
Mixtures
Are elements and compounds , pure substances or mixtures
Pure substances
Define intensive properties
These properties don’t depend on amount of sample. They can be throught of boiling point, color, temperature, luster and hardness , can somewhat though as quality
Define extensive properties
They have volume, mass, size, weight length, these do depend on quantity
What is the formula for density
M/V =d
What are the significant figures rules?
- All non zero digit are significant
- Leading zeros aren’t significant(0.023=2sf)
- Interior zeros are SF (2.002=4sf)
- Trailing zeros are significant after! Decimal point(200.00=5sf)
5.ambigous SF when a zero are at end of a number before a decimal point (200= ambigous or 1 minimum sf ) - Exact # = unlimited sig fig
What’s the rule for significant figure for multiplication and dividision
Fewest sig fig as possible while incorporating the sig fig rules
What’s the formula of kelvin from Celsius?
K=C+273.15
What’s the formula for F from Celsius?
How do you perform cubic equations in conversions?
Define the law of multiple proportions
What two elements form two different compounds the masses of element B that combine with 1g of element A can be expressed as a ratio of small whole #
Describe groups In a periodic table
What are periods in a periodic table?
The rows
What is the symbol for atomic # and symbol
Z
# of protons
What is the symbol for mass # and definition
A
Total # of protons & neutrons
Define isotopes
Atoms have identical atomic % but different number of neutrons
Where are the alkali metals?
Group 1
Where are the alkaline earth metals?
Group 2
