Answer:
B. K,Ca, and Sc
Explanation:
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a) attraction between ions causes the dispersion forces.
Attraction between ions is a temporary attractive force which occurs when electrons in two consecutive adjacently placed atoms occupies positional confined areas that make the atoms acting like Temporary dipoles.
Dispersion forces or London Dispersion forces is the weakest force caused due to motion of electron.
On increasing the number of electrons the magnitude to Dispersion forces increases.
Dispersion forces also depends upon the atomic or the molecular weight of the given substance.
It is caused by an unequal and uneven distribution of the electrons inside an atom.
This causes a slight positive and slight negative charge to be formed inside an atom by establishing a temporary dipole. This temporary dipole induces a nearby atom by inducing another temporary dipole in the other one.
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If a naturally occurring sample of an unidentified element is found to contain three isotopes (A, B, and C) and consists of 90.5% isotope A (mass number 20), 0.3% isotope B (mass number 21), and 9.3% isotope C (mass number 22), the atomic weight of the element measured from the sample will be greater than 21 amu.
To calculate the average atomic mass, multiply the fraction through the mass number for every isotope, then add them together. Whenever we do mass calculations concerning elements or compounds (combos of elements), we usually use average atomic loads.
For instance, carbon-14 is a radioactive isotope of carbon that has six protons and 8 neutrons in its nucleus. We name it carbon-14 because the overall range of protons and neutrons within the nucleus also called the mass number, provides up to fourteen (6+8=14).
Together, the quantity of protons and the range of neutrons determine an detail's mass variety. Due to the fact, that an element's isotopes have barely unique mass numbers, the atomic mass is calculated by obtaining the suggested mass numbers for its isotopes.
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Answer:
B
Explanation:
reaction order is simply the sum of orders for each reactant.
Answer:
E\charged battery to provide electronic difference
