Answer:
Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule.
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Explanation:
All the elements of group 1 in the periodic table are known as alkali metals. These are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (fr).
Characteristics of alkali metals are as follows.
- Alkali metals are soft and can be cut with a knife.
- They are good conductors of heat and electricity.
- They have only 1 electron in their outermost sub-shell.
- They are very reactive.
- Alkali metals are ionic in nature.
The degree to which a liquid resists flowing is called viscosity
You may suppose you have a 0.1 M solution of NH3, from:
NH4Cl + NaOH > NH3 + H2O.
Then you can compute the pH from the concentration of NH3 and its pKb.
The concentration is high enough to use the simplified formula:
[OH] = sqr(Kb*conc)
A structural formula for an organic compound that depicts each valence bond as a short line especially : the hexagonal ring formula for benzene
