What is an isotope? Give an example of an element with isotopes.
Answers
Answer:
isotope. An isotope of a chemical element is an atom that has a different number of neutrons (that is, a greater or lesser atomic mass) than the standard for that element. The atomic number is the number of protons in an atom's nucleus.
Isotope Examples
Carbon 12 and Carbon 14 are both isotopes of carbon, one with 6 neutrons and one with 8 neutrons (both with 6 protons). Carbon-12 is a stable isotope, while carbon-14 is a radioactive isotope (radioisotope). Uranium-235 and uranium-238 occur naturally in the Earth's crust.
Answer:
Isotopes of same element have same atomic number but different mass number.
Related Questions
Outline the typical structure of a carbon-zinc battery.
A physician has ordered 0.50 mg of atropine, intramuscularly. If atropine were available as 0.10 mg/mL solution, how many mL would u need to give?
Which planet do scientists believe prevented the asteroids in the asteroids belt from forming a planet? A. Earth B. Jupiter C. Mars D. Neptune
Used to deliver acids and bases in a titrationa. calorimeter b. Geiger counter c. Burette d. Funnel e. Bunsen burner
High temperatures increase the activation energy of the reaction.
High temperatures make the gas molecules move more quickly.
The reaction becomes exothermic at high temperatures.
Answers
The Haber process is an exothermic reaction at room temperature. This means that the reaction actually favors the reverse reaction, especially when the temperature is increased. So why increase the reaction temperature?
The reason for this is that nitrogen is a very stable element. Therefore, more energy is needed to overcome the slow rate of reaction. So the reaction temperature must be low enough to favor a forward reaction, but high enough to speed up the reaction.
this is wrong do not put this if your with FLVS
the correct answer is C i got 100% on it
Answers
Answer: Option (d) is the correct answer.
Explanation:
When two atoms are bonded together then it is known as a diatomic molecule.
Such as nitrogen exists as molecule in atmosphere so, it is a diatomic molecule.
Hydrogen also exists as molecule in atmosphere so, it is also a diatomic molecule. Also, bromine is a diatomic molecule because it exists as
molecule into the atmosphere.
But helium exists as He molecule as it has 2 electrons so, as per the octet rule it's s-shell is completely filled. Hence, it is stable and exists as a monoatomic molecule into the atmosphere.
Thus, we can conclude that out of the given options, helium is not a diatomic molecule.
Answer:
HELIUM
That's your answer!!
Answers
the correct answer its:
random internal motion of atoms and molecules
hope it helps
Final answer:
The primary cause of diffusion is the random internal motion of atoms and molecules resulting from their thermal energy, leading substances to move from areas of high concentration to areas of lower concentration until evenly distributed. Factors like temperature and the mass of diffusing molecules affect the speed of diffusion. The process continues until it reaches a dynamic equilibrium, where there is no concentration gradient and no net movement of substances.
Explanation:
The primary cause of diffusion is the random internal motion of atoms and molecules due to their thermal energy, a concept derived from Physics. This motion allows substances to move in a way that they can evenly distribute themselves throughout a given space. As a result, diffusion is characterized by movement from high to lower concentration areas, a process that goes on until the substance is evenly distributed in a system.
Several factors can affect diffusion, such as temperature and the mass of the diffusing substance. Higher temperatures enhance the energy and therefore the movement of the molecules, leading to an increased diffusion rate. In contrast, lower temperatures decrease the energy and movement of molecules, thus reducing the diffusion rate. The mass of the molecules diffusing also plays a role - heavier molecules move slower, and therefore diffuse more slowly, whereas the reverse is true for lighter molecules.
A concentration gradient is the factor that primarily fuels the diffusion process. Greater the difference in concentration, the more rapid the diffusion. In case of solutions containing more than one substance, each type of molecule diffuses according to its unique concentration gradient, independently of other substances.
Eventually, the system reaches a stage known asdynamic equilibrium. At this stage, there's no net movement of the substance, yet the molecules continue to move around in the space. The concentration gradient no longer exists, which means that diffusion has ceased.
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Final answer:
The scientific evidence used by scientists usually involves data collected during the course of an experiment. The evidence can be qualitative or quantitative and it is analyzed to draw conclusions. These conclusions either support or reject the initial hypothesis, leading to further hypothesis testing.
Explanation:
Scientists use various forms of evidence to support or critique the conclusions of experiments. This evidence largely consists of data collected during the experiment, which could be either qualitative (descriptive) or quantitative (numerical). These data help in analyzing the results through methods such as statistical, mathematical, or graphical.
Furthermore, scientists use two types of logical reasoning: inductive reasoning using particular results to produce general principles, and deductive reasoning predicting results by applying general principles. After analysis, scientists draw conclusions that can either support or reject their initial hypothesis. If the hypothesis is supported, the process moves on to testing the next related hypothesis. If it's rejected, a new one is formulated for further testing.
Researchers typically present their findings in peer-reviewed scientific papers comprising of sections like introduction, materials and methods, results, and a concluding discussion. This organized and systematic approach ensures the integrity of the scientific process and encourages a thorough scrutiny of every experimental conclusion.
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Answers
Answer: D. calcium chloride
Explanation:
In reaction equations, reactants are on the left side of the arrow and products are on the right side of the arrow. So, our reactants are the elements calcium and chlorine, and our product is the compound calcium chloride.
I hope this helps! :)
Final answer:
In the given chemical reaction equation, the product is calcium chloride as it is formed from the reaction of calcium and chlorine.
Explanation:
In a chemical reaction, substances that are formed as a result of the reaction are known as products. In the given chemical equation, calcium (Ca) reacts with chlorine (Cl2) to produce calcium chloride (CaCl2). Therefore, in this reaction equation, the product is calcium chloride. The reactants, substances that exist before the reaction, are calcium and chlorine. So, the correct answer to your question is D. calcium chloride.
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