Elements, Compounds and Mixtures Science - Elements, Compounds and Mixtures

Fill water in a spray pump, spray the water and observe the spray.

For what purposes is distilled water used?

Which properties of a liquid are seen in the distillation method?

Are the atoms of different elements similar or dissimilar?

What are the properties of elements due to?

For separating insoluble particles of blood (blood cells) from its liquid part (plasma), ……………….. method is used.

……………….. of a compound is a short form of its name written using symbols of its constituent elements.

22-carat gold is an ……………….. of gold.

Symbol for Tungsten is and it is ……………….. and it is derived from its German name ……………….. .

……………….. was the first scientist to use symbols for elements.

Classify the following substances according to their properties
(water, thermocol, soil, iron, coal, paper, rubber, copper, coir, plastic)

Saltwater is a mixture.

A wet cloth is wrapped around a water storage container in summer.

In Chromatography the ingredients of a mixture rise up to a limited height when water rises up to the upper end of the paper.

Buttermilk is churned to get butter.

Name the method you will use to separate the following mixtures:

1. Cream from buttermilk.
2. Mud from muddy water.
3. Stones from grains.
4. Tea leaves from boiled tea.
5. Salt from water.
6. Kerosene and water.
7. Blood cells and plasma.
8. Ink from water

What is a molecular formula?

Some methods of separating the components of a mixture.

Is the water that falls from clouds naturally pure?

How will you separate each component from a mixture of semolina, salt and iron filings?

Write the names of elements from the following symbols:
Zn, Cd, Xe, Br, Ti, Cu, Fe, Si, Ir, Pt.

In day to day life we come across many things in our surroundings. We touch them, we study their properties. Are all these things made from only one kind of matter or from more than one kind of matters?

Separation by distillation and Separation by separating funnel

Atoms and Molecules

Mixture and Compound

Metals and Non-metals

Write short notes on:
(1) Distillation (2) Sublimation (3) Magnetic separation (4) Sedimentation (5) Filtration (6) Evaporation

From the internet or reference books obtain information about elements and prepare a table according to the format given below:

1.Take sugar in a test tube and heat the test tube. Observe what happens. What remains behind?
2.Using tongs hold a magnesium ribbon in a flame and observe what changes took place?
3.What does the name carbon dioxide imply – how many and which elements is this substance made of?
4.Which of these are compound, which are elements?
5.What is the smallest particle of a compound called?

What are the molecular formulae of the following compounds?
(Hydrochloric acid, Sulphuric acid, Sodium chloride, Glucose, Methane)

Draw the experimental setup of weperation using separating funnel:

Collect information and prepare table:

1.Atoms
2.Compounds
3.Mixtures

Take water in a tea pot and cover it, heat the water to a boil. What do you see on the inside of the lid?

1.Take a piece of chalk and keep on dividing it in to smaller pieces, what will happen?
2.Wipe a drop of ink with a handkerchief what effect does it have on the cloth of the handkerchief?
3.What happens when the lid of a bottle of perfume is opened?

Which precaution will you take while using the methods of distillation and separation by separating funnel?

Where are methods of separation by distillation and by separating funnel used?

In everyday life, where and for what purpose do we use centrifugation?

Which elements (metals, non-metals) compounds and mixtures do we use in our day to day life?

How are the components of mixture separated by simple methods?