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Low pH levels: cations with positive charge.
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Why do halogens form ionic compounds with metals?
Halogens have a high electronegativity and metals have a low electronegativity in general. Therefore, metals tend to give up their valence electrons to the halogens. This causes the halogens to form negatively charged ions and the metals to become positively charged ions. The electrostatic attraction between the oppositely charged ions forms the ionic bond which forms the ionic compound.
How does low ionisation energy favor the formation of ionic bond?
Ionisation energy is defined as the amount of energy required to remove the most loosley bound or valence electron from an atom. The lower the ionisation energy, the easier it is to remove the electron. Once the electron has been removed, electroneutrality is lost and the atom develops a positive charge and is known as a positively charged ion. Now, an ionic bond is the bond formed between two oppositely charged species. For example, a bond between a positively charges sodium ion and a negatively charged chloride ion. The lower the ionisation energy, the easier it will be for the atom to lose an electron, thereby forming a positively charged species which will be capable of forming an ionic bond with a negatively charged species. Or lower the ionisation energy, the greater is the tendency to form an ionic bond.
How do ionic substances conduct electricity when melted or dissolved?
Ionic substances consist of cations with high effective nuclear charge (positively charged ions) and anions with low effective nuclear charges (negatively charged ions), this causes all the electrons in the sigma bond to be pulled towards the cation. This results in a negatively charged cation and a positively charged anion. Once melted these ions are free to move about. As electricity is defined as a flow of charge, and these charged ions are free to flow about, the resultant melted substance will conduct electricity. SIMPLE, when solid, ionic substances are held together very tightly, so electrons can not move. BUT, when as molten/liquid/aqueaus the bonds slacks and the electrons are FREE to move!! Therefore conducting electricity... ^_^ "hope this helps!!!"
what do you do if your levels are to high or to low?
what do you do if your levels are to high or to low
Why are Metals are often referred to as electropositive?
Why metals are electron positive in nature?Because by having an octet as their outer electron shell they will become more stable. For metals it's easier to shed electrons to achieve an octet than it is to achieve it by gaining them.
The behavior of cathode rays in a glass tube containing gas at low pressure led scientists to conclude that the rays were composed of?
Were composed of no charge particles .
What is a particle of alpha?
Alpha particles are positively charged. They have low penetrating power but high ionizing power.
Why do halogens form ionic compounds with metals?
Halogens have a high electronegativity and metals have a low electronegativity in general. Therefore, metals tend to give up their valence electrons to the halogens. This causes the halogens to form negatively charged ions and the metals to become positively charged ions. The electrostatic attraction between the oppositely charged ions forms the ionic bond which forms the ionic compound.
How does low ionisation energy favor the formation of ionic bond?
Ionisation energy is defined as the amount of energy required to remove the most loosley bound or valence electron from an atom. The lower the ionisation energy, the easier it is to remove the electron. Once the electron has been removed, electroneutrality is lost and the atom develops a positive charge and is known as a positively charged ion. Now, an ionic bond is the bond formed between two oppositely charged species. For example, a bond between a positively charges sodium ion and a negatively charged chloride ion. The lower the ionisation energy, the easier it will be for the atom to lose an electron, thereby forming a positively charged species which will be capable of forming an ionic bond with a negatively charged species. Or lower the ionisation energy, the greater is the tendency to form an ionic bond.
What is roll of calcium chloride in making competent cells in transformation?
The addition of calcium chloride to a cell suspension promotes the binding of plasmid DNA to Lipopolysaccharide. Positively charged calcium ions attract both the negatively charged DNA backbone and the negatively charged groups in the Lipopolysaccharide inner core. The plasmid DNA can then pass into the cell upon heat shock, where cells are cooled to a low temperature (+4 degrees Celsius) and then heated to a high temperature (+42 degrees Celsius) for a short time.
What is a negative frequency distribution?
If most the population has many high scores, the distribution is negatively skewed. If most have many low scores, it is positively skewed
How do ionic substances conduct electricity when melted or dissolved?
Ionic substances consist of cations with high effective nuclear charge (positively charged ions) and anions with low effective nuclear charges (negatively charged ions), this causes all the electrons in the sigma bond to be pulled towards the cation. This results in a negatively charged cation and a positively charged anion. Once melted these ions are free to move about. As electricity is defined as a flow of charge, and these charged ions are free to flow about, the resultant melted substance will conduct electricity. SIMPLE, when solid, ionic substances are held together very tightly, so electrons can not move. BUT, when as molten/liquid/aqueaus the bonds slacks and the electrons are FREE to move!! Therefore conducting electricity... ^_^ "hope this helps!!!"
Role of mgcl2 in competent cell preparation?
The addition of calcium chloride to a cell suspension promotes the binding of plasmid DNA to Lipopolysaccharide. Positively charged calcium ions attract both the negatively charged DNA backboneand the negatively charged groups in the Lipopolysaccharide inner core. The plasmid DNA can then pass into the cell upon heat shock, where cells are cooled to a low temperature (+4 degrees Celsius) and then heated to a high temperature (+42 degrees Celsius) for a short time.
What is the benefit of using negative voltage in telecom equipment?
To prevent the equipments from lightning strokes. Because the cloud is negatively charged at bottom it requires a zero or a positive potential to discharge, and it selects the ground (Zero potential) to discharge. If the Telecom Equipments are fed with positive the cloud will choose the low resistance tallest positively charged Antenna's to discharge, this could damage the entire setup of Telecom equipments. So the Telecom equipments are fed with Negative supply Voltage.
Is it true that in chemical reactions metal atoms usually become positively charged ions?
Yes,as they have mobile electrons which can be easily donated to other atom .also ionization energy is low
Do electron tends to go to region of high or low potential?
electrons are negatively charged so they tend to move towards the more positive charge which in this case would be high potential.
Why do gases become conductors at low pressure and high voltage?
When we pass electricity through a gas , the gas molecules get excited and give out electrons and the gas molecules become positively charge (form ions). As the ions are positively charged and the electrons are negatively charged they have a tendency to recombine and for a neutral gas molecule again. (Note- High pressure=molecules are more close [more crowding] Low Pressure=molecules are not so close[less crowding] ) At atmospheric pressure the gas molecules are more closer to each other that's why they recombine easily avoiding the electrons to flow. At low pressure the gas molecules are not so close and hence it is difficult for the ion and the electron to recombine and form a neutral molecule. This results into flow of electrons and hence the gas starts to act as an conductor.
