Balancing chemical equations, etc.
Not what you're looking for?
1. Use the periodic table to write the balanced chemical equation for the reactions of elemental calcium atoms and diatomic elemental nitrogen atoms. (Please explain how to use the periodic table to solve this problem and show work - I really want to learn how this works!).
3. An ion has 12 protons, 13 neutrons, and 10 electrons.
What is its charge? Consult the periodic table and write the symbol of the ion. (Why do I have to consult the table? Can't I just subtract?)
2. The diameter of an atom is approximately 10210 m. The diameter of an atomic nucleus is about 10215 m. What is the ratio of the atomic diameter to the nuclear diameter? (Please show formula and work).
Purchase this Solution
Solution Summary
The expert examines balancing chemical equations for the periodic table. The ratio of the atomic diameter to the nuclear diameter are determined.
Solution Preview
ANSWER:
3Ca + N2 → Ca3N2
Note: You need to consult the periodic table to know the corresponding charges of calcium and nitrogen when they form compounds. For example, based on the periodic table, calcium belongs to Group II. Hence, it forms a cation with +2 charge, that is, Ca+2. On the other hand, nitrogen belongs to Group V in the periodic table. Hence, it forms anion with -3 charge, that is, N-3. When Ca+2 and N-3 react, cross-over rule is applied, hence the formula of the compound is Ca3N2:
Ca+2 + ...
Purchase this Solution
Free BrainMass Quizzes
Organic Chemistry Naming: Alkanes
This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.
Match Elements with their Symbols
Elements are provided: choose the matching one- or two-letter symbol for each element.
Thermochemistry
The quiz helps in revising basic concepts about thermochemistry.
Functional groups in Organic Chemistry
You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.