Question

• The number of atoms of each element on the reactant s
An equation that satisfies this rule is called a balanced chemical equation.
Exercises
A. Answer the following in not more than 20 words.
1. What does the formula of a substance tell you?
2. What do you mean by the valency of an element?
3. What is the following called?
A group of atoms of two or more elements behaving like an atom and ha
4. Name two elements that have variable valency. Give the formulae and na
formed by each of these elements.
5. What is a balanced chemical equation? Why should a chemical equatio
B. Find the valencies of the underlined elements or radicals in the following con
BaCl2, PCl2, PCl5, NH3, MgSO4, CaCO3, Na2O, CaO, Ca(OH)2, F
FeCl3, Fe,O3, NaOH, Al(OH)3, NaCO3
C. Answer the following in not more than 100 words.
1. What are compound radicals? Give examples of a few radicals, along
mention some compounds containing compound radicals. Give the ya
mo​

Answer 1

Answer: what is cytology

sorry i dont have ans

Explanation: