1. all elements are made of small particles called atoms
2. atoms of one element are identical in their properties, different atoms from different elements differ in properties
3. chemical reactions consist of atoms rearranging in whole number ratios
4. atoms can not be subdivided, created, or destroyed
<u><em>Answer:</em></u>
- The correct answer is a.
- The ratio of their masses is always the same
<u><em>Explanation:</em></u>
- Dalton law was based on law of conservation of masses and law of conservation definite proportional. So here , it is cleared that the ratio of their masses should be always same.
Answer:
Explanation:
Hello,
In this case, the molarity is defined as the ratio of the moles of the solute to the volume of the solution in liters:
In this case, the solute is the KCl (potassium chloride) and the solution is made up of both water and KCl. Moreover, since during this type of dissolution processes, the volume of the solution is not significantly affected by the addition of the solute, the resulting molarity is:
Best regards.
Answer : The more abundant isotope is, Li isotope-7
Explanation :
Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
For Li isotope-7 :
Mass of Li isotope-7 = 7 amu
Fractional abundance of Li isotope-7 = 92.5 %
For Li isotope-6 :
Mass of Li isotope-6 = 6 amu
Fractional abundance of Li isotope-6 = 7.5 %
Average atomic mass of Li = 6.941 amu
As we know that the more abundant isotope is that whose percentage abundant will be more and atomic mass of isotope will be near to average atomic mass of isotope.
From this we conclude that, the percentage abundant of Li isotope-7 is more and their atomic mass is near to average atomic mass.
Hence, the more abundant isotope is, Li isotope-7
