A solid substance is an excellent conductor of electricity. the chemical bonds in this substances are most likely metallic, because the valance electrons are mobile. Therefore the correct option is option D.
Metallic bonding is a type of chemical bonding that rises from the electrostatic attractive force between conduction electrons and positively charged metal ions.
If a solid substance is able to conduct electricity then the chemical bond in the substance will definitely be metallic bond. The reason for excellent conductor of electricity is the mobility of the valence electrons. In metallic bonds valence electrons are mobile.
Therefore the correct option is option D that is metallic, because the valance electrons are mobile.
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Answer;
-4. metallic, because the valance electrons are mobile
Explanation;
-Electrical conductivity in metals is a result of the movement of electrically charged particles.The atoms of metal elements are characterized by the presence of valence electrons (electrons in the outer shell of an atom) that are free to move about.
-Therefore; Metallic elements such as sodium and potassium conducts electricity in solid form due to the presence of delocalized valence electrons. These electrons can move freely within the structure of a metal when an electric current is applied.
liquid
solid and gas
liquid and solid
Answer:
Liquid
Explanation:
Please don't jugde me if I got it wrong
Answer:
I belive its liquid if I'm right because liquids are packed together when they take shape but they are still able to move.....brainliest???
As reactants form products, the potential energy increases.
Thermal energy is transferred from the product to the reacting substances.
Thermal energy is transferred from the surroundings to the reacting substances.
Answer is: As reactants form products, the potential energy decreases.
There are two types of reaction:
1) Endothermic reaction (chemical reaction that absorbs more energy than it releases).
2) Exothermic reaction (chemical reaction that releases more energy than it absorbs).
For example, balanced chemical reaction:
C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O ΔrH= -1370 kJ/mol.
This reaction is exothermic reaction (heat is released), so products have less potential energy and energy is transerred to surroundings.
Considering the definition of exothermic reaction, as reactants form products, the potential energy decreases (first option).
Energy is the ability to do work or to produce heat.
Chemical reactions involve a rearrangement of atoms between substances with the breaking or formation of chemical bonds. In general, this formation or breaking of chemical bonds is accompanied by changes in the energy of the system.
In exothermic reactions, energy is released when they occur (usually this energy is released in form of heat), so the reaction system temperature increases.
In a chemical reaction, the reactants are the compounds that are transformed and give rise to the products. Reactants and products have stored potential energy. In an exothermic reaction, the reactants have more potential energy compared to the products, so the excess energy is released as heat, thus complying with the law of conservation of energy, which says that energy is not lost. gain or loss, so the energy of the reactants must be equal to that of the products.
In summary, considering the definition of exothermic reaction, as reactants form products, the potential energy decreases (first option).
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Answer:
Yes; new substances formed, as evidenced by the color changes and bubbles. Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change
He used a scientific method to conduct his experiment.
He wrote his results down as four parts of the atomic theory.
He verified Democritus’s idea that matter was composed of atoms.
its A) He reinterpreted and retested Joseph Proust’s results.
Determining the number of atoms in a jar of liquid task most likely involves a calculation that uses moles.
The term mole is defined as a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.
A mole is the amount of material including 6.023 × 10²³ particles. 1 mol = 6.023 × 10²³particles. This number is also called Avogadro's number.
In determining the number of atoms that makes up a substance, the number of moles is very necessary.
The mole is the favorable unit of quantity of particles. It can be likened to a quantity of things in everyday life like a dozen, a score and a gross.
A mole of any substance contains 6.023 x 10²³ particles
These particles can be atoms, protons, neutrons, electrons etc.
Thus, to find the number of atoms, we must know the number of moles.
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Your answer is: determining the number of atoms in a jar of liquid.