6. ) Name the elements which form water. State three
characteristics of water to justify that it is a
compound
Give three differences between metals and
non-metals.
Answers
Hydrogen and oxygen form the water.
Compounds contain two or more different elements. Water is a molecule because it contains molecular bonds. Water is also a compound because it is made from more than one kind of element (oxygen and hydrogen). If you like, you can say that water is a molecular compound.
Metals refers to the natural elements that are hard, shiny, opaque and dense. Non-metals implies those chemical substances that are soft, non-shiny, transparent and brittle. Most metals are hard, except sodium. Most non-metals are soft, except diamond.
Hope it helps you...
Answer:
Water is made up of 2 elements namely oxygen and hydrogen. Two hydrogen atoms and one oxygen atom combine to give one molecule of water.
Water is a compound because compounds are made up of different elements in fixed proportion by mass likecouse, in water molecule, hydrogen and oxygen form compound H 2O in the ratio of 1.8 by mass.
METALS
All metals are solid at room temperature except mercury, which is a liquid at room temperature.
All metals are lustrous.
Metals have high densities except lithium, soduim and potassium.
Metals are malleable.
Metals are ductile.
They are good conductors of heat and electricity.
They have high melting point.
NON-METALS
Non-metals exists as solid, liquid and gas.
silicon is a solid, bromine is a liquid and oxygen is a gas.
Non-metals are non-lustrous.
They have low density.
They are non-malleable.
They are non-ductile.
They are poor conductors of heat and electricity.
They have low melting and boiling point.