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Is every number greater than its oppisites?
It is not clear what you mean by "oppisites" or even opposite. Often a number is the opposite of its opposite. So if the first is greater than the second, the second, which is the opposite of the first, is smaller than the first.
How do you get a negative answer when subtracting two positive numbers?
Have the second number be greater than the first.
Is 0.584 greater than 0.58?
Yes
Do you get a positive number when subtracting two negative numbers?
Have the second number be greater than the first.
What is five coordinate pairs where the second number is one greater than the first number?
u8iu7i7u
What is the first electron affinity of magnesium and is it exothermic or endothermic?
66
What do we mean by the first second third ionization energies for a particular atom?
First ionization energy is the energy required to remove the first outermost electron from an atom. The second ionization energy is the energy required to remove the next available electron, and is greater than the first IE. The third IE is that energy needed to remove the third electron, and is greater the the second IE.
Are there any trends to the periodic table?
Atomic Radii,Ionic Radii, First Ionization Energy,Second and Higher Ionization Energies, Electron Affinity.
When compared with the energy of an electron in th first shell of a carbon atom the energy of an electron in the second shell of a carbon atom is?
greater
What do we mean by the first second and third ionization energies for a particular atom?
First ionization energy is the energy required to remove the first outermost electron from an atom. The second ionization energy is the energy required to remove the next available electron, and is greater than the first IE. The third IE is that energy needed to remove the third electron, and is greater the the second IE.
Which determines the reactivity of the elements?
Roughly, first ionization potential and electron affinity.
What is beryllium's electron affinity?
It is NOT negative (for the first IE). Because Be's configuration is 1s2 2s2, we observe that it has no vacant orbital to accommodate an electron, meaning that to insert an electron, it has to go into a new sub-orbital, the higher-energy 2p. Hence, you need energy to promote this electron to a 2p level to force Be to accept it.
How is the chemical symbol of an element determined-?
Usually the first and second letter of element can determine it's chemical symbol.
Why oxygen is having two electron affinity?
First EA is usually exothermic as energy is released when the nucleus attarcts an electron is larger than the energy taken in to overcome their inter-electronic repulsion. Second EA is always endothermic since electron is added to a negative ion. Energy is needed to overcome the repulsion between the two negatively charged species.
Does magnesium sodium neon or oxygen have the highest first electron affinity?
Oxygen: It has higher electronegativity than any of the others listed.
How do you determine electron affinity?
Measure the equilibrium constant for the reaction of thermal electrons with a species at different temperatures. this has been done with an electron capture detector. another way to measure it is to make a negative ion and shine light on it and measure the energy of the electrons removed by this process Dr.Edward Chen
Why there is big gap between first and second ionization energies?
Ionization energies are the amount of energy needed to remove an electron from an atom in the gaseous state, thereby giving the atom a positive charge and making it an ion. Ions get a +1 charge for each electron lost. It is this positive charge of the atom that makes the second ionization energy considerably greater than the first. Not only does the second electron have to overcome the initial attractive forces to nucleus, it must also overcome the extra +1 charge the atom has after the loss of the first electron, which simply takes more energy.
