-What is 1 each element is made up of tiny particles called atoms
-atoms of a given element are identical to the atoms of different elements
- chemical compunds are formed when atoms of different elements react with eachother
-chemical reactions involve the rearrangement of the atoms. atoms are not created nor destroyed
200
leading zeros are____
What is not significant
200
for adding and subtracting round off to the ____ _____
What is decimal place
200
state chemical properties
What is energy change,new substance, reaction with "___"
200
neutron(symbol,charge,mass,location)
What is n,0,1amu,nucleus
200
what m does stand for and conversion
What is milli 1000mm=1m
300
captive zeros are____ ____
What is always significant
300
for multiplication and division round off to the _____
What is fewest
300
heterogeneous
What is mixed
300
electron(symbol,charge,mass,location)
What is e-,-1,0amu,electron cloud
300
what does d stand for and conversion
What is deci 10dm=1m
400
trailing zeros are ___ _____
What is always significant(decimal point only)
400
define %rsd AND precision
What is percent- relative standard deviation AND repeatability
400
homogeneous
What is same
400
law of conservation of mass
What is mass is neither created nor destroyed in chemical reactions
400
what does m stand for and conversion
What is meter little longer than a yard, base unit
500
significant if there is a ____ ____ or _____ AND exact values have ___ ___ figures
What is decimal point or repeating number AND unlimited significant
500
define %eda, accuracy
What is percent- error due to accuracy AND actual
500
M
What is Molarity
500
law of definite proportions
What is a given compund always contains exactly the same proportion of elements by mass