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24 Cards in this Set

  • Front
  • Back

What is an element?

Element is a substance that is made of only one sort of atom

What is the nucleus of an atom made up of?

Protons and neutrons

What is the nucleus of an atom surrounded by?

Electrons

Protons have what type of charge?

a positive electric charge

What type of charge does an electron have?

A negative charge

The number of electrons is equal, more or less than the number of protons in the nucleus?

Equal- so they have no electrical charge

Group 1 elements are alkali metals because of what?

They form alkaline compounds

What is the word formula for group 1 elements reacting with water?

Metal+ water--> metal hydroxide+ hydrogen

Lithium burns with what colour flame?

Red

Solium burns with what colour flame?

Yellow-orange

Potassium burns with what colour flame?

Lilac

Group 0 are called what because of what reason?

Noble gases because they are unreactive

What do elements in the same period have?

Occupied energy levels or shells

What do elements in a group have the same number of?

Electrons in the highest occupied energy level or outer shell

In ionic binding what happens to metal atoms?

They lose electrons to form positive ions

What happens to non metal atoms in ionic bonding?

They gain electrons to form negatively charged ions

How many oxygens does CO2 contain?

2

What is an ionic bond?

A force of Attraction between oppositely charged ions

Limestone is mainly made from what chemical?

Calcium carbonate

Advantages of limestone

Valuable natural resource


Used to make glass and concrete


Provides employment opportunity that support local economy


Disadvantages of limestone

Visible from long distances


May perminatly disfigure the local environment


Creates nois and heavy traffic

What is distillation?

A process used for separating a pure liquid from a mixture of liquids


What is the sequence in distillation?

Heating,evaporation, cooling, condensing

Are alkenes saturated or unsaturated?


Saturated