Chemical changes do not form new compounds
do not decompose the old compounds
form new compounds
change the appearance of the old compounds
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Related Questions
Which type of reaction produces the most dangerous radioactive waste?
Which process in the water cycle do plants perform?
25. In the formula for a molecular compound, which atom generally comes first? You may wentto refer to a periodic table.
Metals experience plastic deformation when _____.
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calcium-40
molybdenum-98
mercury-194
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The "mercury-194" is a kind of isotope which is untastable and radioactive.
What is isotope?
Isotopes may be members of the very same element's family but also have variable counts of neutrons despite roughly the identical count of protons.
What is radioactive?
An unstable nucleus of an atom releases energy through radiation in a process known as radioactive decay.
Therefore, the "mercury-194" is a kind of isotope which is untastable and radioactive.
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Answer: Mercury-194 is an unstable isotope and hence is radioactive.
Explanation: Mercury-194 is an isotope of mercury, having formula
Number of protons in this isotope = 80
Number of neutrons in this isotope = 114
This isotope is radioactive in nature and under decay process by Electron Capture.
Electron capture reactions are the reactions in which a proton in a nucleus absorbs an electron and convert it into neutron. The resulting nucleus will have a decreased atomic number and same atomic mass.
Reaction for electron capture of mercury-194 follows:
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Answer:
They have similar chemical properties
Explanation:
Hi, those elements all belong to the Group I of the periodic table meaning that they share not only similar electronic configuration (1 electron of valence) but also they have similar chemical properties, being those more marked the higher the atomic number.
- An example of that shared properties is that all of them react violently with water, being cesium the most violent.
Each carbon atom covalently bonds with atoms of carbon, hydrogen, oxygen, and nitrogen.
Each carbon atom ionically bonds with atoms of oxygen and nitrogen.
Each carbon atom covalently bonds with atoms of oxygen and nitrogen.
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Each carbon atom covalently bonds with toms of carbon, hydrogen oxygen, and nitrogen
A carbon atom can have 4 single valence electrons around it. This allows it to form covalent bonds with many different atoms.
Each carbon atom covalently bonds with atoms of carbon, hydrogen, oxygen, and nitrogen describes why carbon can form a wide variety of organic compounds. thus, option B is correct.
What is valency?
Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are in the outer shell.
Carbon can form a wide variety of organic compounds because Each carbon atom covalently bonds with atoms of carbon, hydrogen oxygen, and nitrogen. a carbon atom can have 4 single valence electrons around it. This allows it to form covalent bonds with many different atoms.
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Energy = mCΔT
Energy = 59.7 (0.231) (100-25)
Energy = 1034.30 J
The amount of heat energy needed to raise the temperature of 59.7g of cadmium from 25°C to 100°C is 1,034.3J.
How to calculate amount of energy?
The amount of heat energy needed to raise a temperature can be calculated using the following expression;
Q = mc∆T
Where;
- Q = amount of energy released or absorbed
- m = mass of substance
- c = specific heat capacity
- ∆T = change in temperature
According to this question, 59.7g of cadmium is needed to be raised from 25°C to 100°C. The amount of heat needed can be calculated as follows:
Q = 59.7 × 0.231 × (100 - 25)
Q = 1,034.3J
Learn more about energy at: brainly.com/question/33447128
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