2019 Mod 2 Flashcards
What is the difference between the continuous theory of matter in the discontinuous theory of matter?
The continuous theory of matter state that matter comes in long, continuous sheet. The discontinuous theory of matter, however, assumes that matter comes in little packets and the only reason matter looks continuous is that we cannot magnify enough to see the little packets of matter.
What to laws were instrumental in the development of Dalton’s atomic theory? What law did Dalton predict using his theory?
The law of definite proportions and a lot of mass conservation
The law of multiple proportions
Describe how the mask am serious and can be used to explain the result of experiment 2.1
matter was not Created or destroyed. It only changed form
List the first assumption of Dalton’s atomic theory
All elements are composed of small indivisible particles called atoms
What is the second assumption of Dalton’s atomic theory?
All atoms of the same element have exactly the same properties
List the third assumption of Dalton atomic theory
Adams of different elements have different properties
List the fourth assumption of Dalton’s atomic theory
Compounds are formed when Adams are joined together since atoms are indivisible they can join together only in simple whole number ratios
Which of the four Assumption’s are wrong?
First and second
What is the difference between an Adam and an element?
Elements are made of identical atoms
What is the difference between a molecule and a compound?
Compounds are made of identical molecules
What is the difference between an Adam and a molecule?
And Adam is the smallest unit of matter. A molecule is also a unit of matter, but it is formed when Adams joined together. A molecule is made up of more than one Adam
What is the difference between an element in the compound?
Elements are made of identical atoms well compounds are made of identical molecules
What are the physical characteristics that distinguish metals from nonmetals
Metals have luster, are malleable, and are able to conduct electricity.
How can you determine whether an atom is a metal or nonmetal from the periodic table? Are there any exceptions?
There is a dark jacket mine that runs down the periodic table anything left of that line is a metal the exception is hydrogen
How can you experimental I determine whether a compound is ionic or covalent
By seeing if the compound conducts electricity when it is dissolved in distilled water
How can you determine from the periodic table whether a compound is ionic or covalent
If it is a metal it must be ionic
Which law governs why carbon and oxygen conform to different molecules; CO and CO2
The law of multiple proportions
Why do chemist use two different naming systems for compound?
Because in ionic compounds there’s only one possible combination of Adams. In covalent compounds there are many combinations that are possible
If a substance can be physically separated into it component is it a pure substance or a mixture?
Mixture
If a substance can be given a chemical name, such as calcium bromide, is a pure substance or a mixture?
Pure substance
What element makes up the majority of the airway and help? Inhale
Nitrogen (N)
Describe the difference between quantitative and qualitative measurement
A quantitative measurement is one that is made using a precise and quantifiable measurement process. A qualitative measurement is descriptive, subjective, or difficult to measure; It is often an estimated measurement or best approximation
A change that seems to break a molecule part is called a
Chemical change or chemical reaction
A student right this formula for sodium chloride NACL. What is wrong with this formula?
It should be NaCl
The second letter of an atomic symbol should be lowercase
What are the elements that light along the jagged line called
Semimetals
Describe a dimensionless quantity
A measurement with no units
Why doesn’t distilled water conduct electricity
It has no charged particles
What does H stand for?
Hydrogen
