Chemistry
A sample of an element A contains two isotopes 168A and 188A. If the average atomic mass of the element is 16.2 amu, calculate the percentage of the two isotopes in this sample.
Related Questions
(a) Name the charged particles which attract one another to form electrovalent compounds.
(b) In the formation of electrovalent compounds; electrons are transferred from one element to another. How are electrons involved in the formation of a covalent compound ?
(c) The electronic configuration of nitrogen is (2, 5). How many electrons in the outer shell of a nitrogen atom are not involved in the formation of a nitrogen molecule ?
(d) In the formation of magnesium chloride (by direct combination between magnesium and chlorine), name the substance that is oxidized and the substance that is reduced.
An element X has 2 electrons in its M shell, it forms bond with an element Y which has 7 electrons in its third orbit.
(a) Write the formula of the compound formed.
(b) Which nearest inert gas electronic configuration will element X and Y acquire?
(c) Show using an orbital diagram the formation of compound between X and Y.
In the formation of (i) Oxygen molecule (ii) Carbon tetrachloride molecule, state the following:
(a) Electronic configuration of nearest inert gas attained.
(b) How many electrons are shared/transferred in bond formation?
(c) Which type of bonds these compounds form?
(d) Draw the orbital diagrams?
What is the average atomic mass of bromine if it has 49.7% 7935Br and 50.3% 8135Br?