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Chapter 3 Review- Atoms: The Building Blocks of Matter
(all answers below)
Democritus's view of matter was not supported by experimental evidence, thus leaving his ideas in speculation for years. Dalton's view is considered a theory due to his explanation of the law of conservation of mass, the law of definite proportions and the law of multiple proportions.
Direct words from the Modern Chemistry textbook (2011)
"By relating atoms to the measurable property of mass, Dalton turned Democritus's idea into a scientific theorythat could be tested by experiment.
IF YOU ARE INTERESTED IN ALL THE ANSWERS TO THAT WORKSHEET, READ BELOW.Here are all the questions and their corresponding answers:
- Why is Democritus's view of matter considered only an idea, while Dalton's view is considered a theory?
- Democritus's idea of matter does not relate atoms to a measurable property, while Dalton's theory can be tested through quantitative experimentation.
- Give an example of a chemical or physical process that illustrates the law of conservation of mass.
- A glass of ice cubes will have the same mass when the ice has completely melted into liquid water, even though its volume will change. (Accept any reasonable process.)
- State two principles from Dalton's atomic theory that have been revised as new information has become available.
- Atoms are divisible into smaller particles called subatomic particles. A given element can have atoms with different masses, called isotopes.
- The formation of water according to the equation...
2H2 + O2 → 2H2O
...shows that 2 molecules (made of 4 atoms) of hydrogen and 1 molecule (made of 2 atoms) of oxygen produce 2 molecules of water. The total mass of the product, water, is equal to the sum of the masses of each of the reactants, hydrogen and oxygen. What parts of Dalton's atomic theory are illustrated by this reaction? What law does this reaction illustrate?
- Atoms cannot be subdivided, created, or destroyed. Also, atoms of different elements combine in simple, whole-number ratios to form compounds. The reaction also illustrates the law of conservation of mass.
- If 3 g of element C combine with 8 g of element D to form compound CD, how many grams of D are needed to form compound CD2?
- 16g
- A sample of baking soda, NaHCO3, always contains 27.37% by mass of sodium, 1.20% of hydrogen, 14.30% of carbon, and 57.14% of oxygen.
a) Which law do these data illustrate?
- the law of definite proportions
- A chemical compound contains the same elements in exactly the same proportions by mass regardless of the sample or the source of the compound.
- Nitrogen and oxygen combine to form several compounds, as shown by the following table.
a) 2.0
b) 2.0 (really 1.9) (based on my calculations)
c) 4.0 (really 4.9) (based on my calculations)
d) law of multiple proportions
For the last ones, (#7) replace the "NO#" etc letters with the numbers in the chart and divide.
All of these answers come right from the answer book.rec-co-m end me! (below)
What else can I help you with?
Which model of an atom first introduced the idea of a nucleus?
Democritus, an ancient Greek philosopher living around400 BC, is credited with creating the original theory of atoms. He coined the word "atomos", which means "indivisible". He stated that all matter is made up of atoms. Democritus's model of an atom consisted of a smooth, hard ball. He said that atoms are indestructible and always in motion. Democritus thought that atoms differ in shape and size. There is an infinite number of atoms and infinite kinds of atoms. Although many of his theories have since been proven false, Democritus is considered "the father of modern science".
What did Democritus believe the universe is made of?
Democritus believed that matter is made of tiny indivisible particles called atoms. He believed that the atoms have always been, and always will be, in motion; that there are an infinite number of atoms, and kinds of atoms, which differ in shape, and size.
Why is democritus imortant with regard to atomic theory?
Democritus; together with Leucippus; are the first ones who mentioned that any element is composed of atoms. Their speculation on atoms, taken from Leucippus, bears a passing and partial resemblance to the nineteenth-century understanding of atomic structureThe theory of Democritus and Leucippus held that everything is composed of "atoms", which are physically, but not geometrically, indivisible; that between atoms, there lies empty space; that atoms are indestructible; have always been, and always will be, in motion; that there are an infinite number of atoms, and kinds of atoms, which differ in shape, and size.Of the mass of atoms, Democritus said "The more any indivisible exceeds, the heavier it is." But his exact position on weight of atoms is disputed
What is one idea about which they differ?
One idea that people often differ on is the best approach to solving climate change. Some may advocate for government regulations and policies to address the issue, while others may prefer market-driven solutions and technology advancements. Each approach has its own merits and drawbacks, leading to ongoing debate and differing opinions on the most effective way to combat climate change.
How are weilders different?
Wielders differ in their skill level, experience, technique, and style. Some may specialize in certain types of weapons or martial arts, while others may have a more general approach. Each wielder's training and background contribute to their unique approach to combat.
How did the early ideas about atoms Democritus and Aristotle discussed differ from the work of scientists that came later?
Democritus proposed that matter is made up of indivisible particles called atoms, which differ in shape and size. Aristotle, on the other hand, believed in four elements (earth, water, air, fire) and did not support the idea of indivisible particles. Later scientists built on Democritus's concept by discovering the structure of the atom, including subatomic particles and the existence of a nucleus.
How does the approach of art critic differ from the approach of an art historian?
They arent used by art critics and historians
What is experimental approach?
Theoretical Approach is looking at the data and determining an outcome. Experimental Approach is performing the procedure and recording the actual oucome, which can differ from the theory or theoretical approach.
How did the approach of government of Harding and Coolidge differ from that of the progressives?
jew
How did the approach to government of Harding and Coolidge differ from that of the progressive?
jew
When a scientist does an experiment and draws a conclusion how does the conclusion differ from a theory?
A conclusion is what the experimenter observes from the experiment andwhether your hypothesis was proven correct or not.While the theory is the facts that is known about the experiment
How does formulating a research design differ from developing an approach?
i dont knoe the answer
Who is the Greek philosopher invented the word atom?
The Greek philosopher who is credited with introducing the concept of "atom" is Democritus. He proposed that matter is composed of indivisible particles called atoms, which differ in shape and size, and are constantly in motion. This idea laid the foundation for modern atomic theory.
Who are democritus and Aristotle and how did they differ in their beliefs and matter?
Democritus was a Greek philosopher who proposed the concept of atomism, suggesting that all matter is made up of tiny, indivisible particles called atoms. Aristotle, on the other hand, believed in a continuous, infinite and indivisible substance called "hyle." Democritus's atomism focused on the idea of empty space between atoms and their constant motion, while Aristotle's view emphasized the qualities and elements that composed matter.
How did aristotle's view of matter differ from those of Democritus and Leucippus?
Aristotle saw matter as continuous and infinitely divisible, while Democritus and Leucippus believed that matter was composed of indivisible particles called atoms. Aristotle's theory focused on the idea of substances possessing specific qualities, while Democritus and Leucippus emphasized the concept of atoms moving in empty space.
When was the model of the atom made?
Democritus, an ancient Greek philosopher living around400 BC, is credited with creating the original theory of atoms. He coined the word "atomos", which means "indivisible". He stated that all matter is made up of atoms. Democritus's model of an atom consisted of a smooth, hard ball. He said that atoms are indestructible and always in motion. Democritus thought that atoms differ in shape and size. There is an infinite number of atoms and infinite kinds of atoms. Although many of his theories have since been proven false, Democritus is considered "the father of modern science".
How did w e b dubois approach to society differ from other sociologial theorist?
1g
