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When struck with a sharp blow ionic compounds tend to what while metallic substances which are what change shape?
Wiki User
∙ 12y ago
This makes the most sense. A lot of ionic compounds form salts which are crystalline and brittle in solid form. This is obviously homework but what a terrible question, right down to the punctuation.
Wiki User
∙ 12y ago
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When struck with a sharp blow ionic compounds tend to what while metallic substances which are what change sharpe?
Ionic compounds tend to shatter when struck with a hammer. This is due to the crystal structure formed by an ionic compound, which is basically repeating units of negatively and positively charged ions in some sort of geometric arrangement. When struck, ions of similar charge and pushed next to each other. These ions repel and the whole crystal will then cleave apart along the crystal pattern. example: Left undisturbed NaCl crystal, right struck Na Cl :crys.tal breaks along crystal pattern Na Cl Na Cl Na Cl Cl Na Cl Na Cl Na Na Cl Na Cl Na Cl Na Cl Cl Na Cl Na Cl Na Cl Na Na Cl Na Cl Cl Na Metallic bonds are better pictured as an electron sea, where all the metal atoms that are participating are freely sharing electrons amongst each other. Because of this there are no localized charges to repel each other, making metallic bonds far less susceptible to shattering.
Classify the following as a chemical or physical property or change. A tree is struck by lightning. why?
It is a physical change, because even though the tree was struck by a strong force of power(lightning), it is evident that no new substance was formed.
A match head ignites when struck Is this a chemical property?
yes it is a chemical change
How is lighting a match a chemical change?
The sulfur on the match catches fire from friction as it is struck on the matchbox.
Are molecular compounds poor conductors of electricity?
Electricity put simply is a flow of electrons. Molecular compounds do not tend to conduct electricity because they have no delocalised electrons and are not free to move and carry electric charge. Metallic compounds can conduct electricity because they form a lattice where the electrons in the valence shell leave the atom and are free to move throughout the lattice. Therefore a metallic lattice is a whole lot of metal cations (positive ions) as they have lost electrons surrounded by a 'sea of electrons'. Ionic compounds can also conduct electricity, but not in the solid state. If you dissolve a metal salt such as NaCl into water, it leaves the lattice and breaks down into its constituent ions : Na+ and Cl-. These ions can then move freely throughout the liquid and conduct electric current. However, acids are covalent compounds that can conduct electricity when dissolved in water, as it ionizes, which means to react with water to produce two or more ions. Electricity put simply is a flow of electrons. Molecular compounds do not tend to conduct electricity because they have no delocalised electrons and are not free to move and carry electric charge. Metallic compounds can conduct electricity because they form a lattice where the electrons in the valence shell leave the atom and are free to move throughout the lattice. Therefore a metallic lattice is a whole lot of metal cations (positive ions) as they have lost electrons surrounded by a 'sea of electrons'. Ionic compounds can also conduct electricity, but not in the solid state. If you dissolve a metal salt such as NaCl into water, it leaves the lattice and breaks down into its constituent ions : Na+ and Cl-. These ions can then move freely throughout the liquid and conduct electric current. However, acids are covalent compounds that can conduct electricity when dissolved in water, as it ionizes, which means to react with water to produce two or more ions.
Why do metallic substances change shape when struck?
Malleability is a property of all metals.
When struck with a sharp blow ionic compounds tend to what while metallic substances which are what change sharpe?
Ionic compounds tend to shatter when struck with a hammer. This is due to the crystal structure formed by an ionic compound, which is basically repeating units of negatively and positively charged ions in some sort of geometric arrangement. When struck, ions of similar charge and pushed next to each other. These ions repel and the whole crystal will then cleave apart along the crystal pattern. example: Left undisturbed NaCl crystal, right struck Na Cl :crys.tal breaks along crystal pattern Na Cl Na Cl Na Cl Cl Na Cl Na Cl Na Na Cl Na Cl Na Cl Na Cl Cl Na Cl Na Cl Na Cl Na Na Cl Na Cl Cl Na Metallic bonds are better pictured as an electron sea, where all the metal atoms that are participating are freely sharing electrons amongst each other. Because of this there are no localized charges to repel each other, making metallic bonds far less susceptible to shattering.
Does non metallic coins exist?
Yes. The US has struck patterns in multiple materials including plastic and wood. I have a Japanese 5 Fen coin (1945) that was struck in compressed fibers as well.
What is taylormade hot melt?
It involves a process of injecting hot epoxy into the club head to change the clubs sound and weight characteristics. This process typically eliminates the metallic sound of the club when the ball is struck and is also used to reduce ball spin. This process is normally limited to "tour" clubs.
The hammer might have struck him change in to passive voice?
The hammer might have hit him to change into his passive voice.
What happens to the person in a car when car gets struck by lightning?
Nothing really happens to the person in a car when the vehicle gets struck by lightning as long as they remain in the car. Once a person touches a metallic part of the car and the ground at the same time, they run the risk of electrocution.
Classify the following as a chemical or physical property or change. A tree is struck by lightning. why?
It is a physical change, because even though the tree was struck by a strong force of power(lightning), it is evident that no new substance was formed.
A match head ignites when struck Is this a chemical property?
yes it is a chemical change
What struck your head yesterday change this into passive voice?
What was your head struck by yesterday? (Some people would say "By what was your head struck yesterday?" but generally this sounds very formal or even stilted.)
Are covalent bonds mallable?
No not at all only metallic bonds are malleable. An example of this is iron can be struck to from many shapes. While diamond which is a lattice of carbon to carbon covalent bonds though extremely hard is impossible to disform
Are physical changes and chemical changes the same?
The answer, on a basic level is no, but it leaves me wondering if you are asking about some particular type of physical change, since the question is a bit far reaching. The physical change of water from solid (ice) to liquid, for instance, changes nothing in its chemical structure, it is still good old H2O. On the other hand, the physical change referred to as nuclear fission, ie, the change of the nucleas of an atom, can indeed create a chemical change. Uranium 235, for instance when struck with an additional neutron, will absorb the neutron into its nucleas (pretty much a physical event since the extra neutron is intentionally shot at it by us humans using ingenious devices like cyclotrons), thus making the atom unstable (it was happy the way it was), and causing it to break down into various other chemical substances such as barium, strontium, xenon and other things, but in any case whatever the result, the atomic masses will always add up to 236 (U235 plus the mass of the extra neutron). So we have taken a molecule of uranium, smacked it with a neutron (a physical action) and caused it to break down into atoms of lower atomic number. If you are at an elevated level of chemistry, best to study physical chemistry and nuclear chemistry/physics. If you are at a basic level, the answer to your question is NO. Ray
How is lighting a match a chemical change?
The sulfur on the match catches fire from friction as it is struck on the matchbox.
