Question

element will also be X3
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HOTS QUESTIONS: Think and answer.
1 The symbol of an element is X. Is it possible that the formula of the element w
Explain with examples.
2. Scientists can break atoms to get still smaller particles. In the light of what you ha
this chapter. do vou think that a broken ajom gt say god, will have the same pro
the broken atom e Soldi ers ellicient as com
atom of gold? Liene d because as they are matter the pared to
3. Helium is the second most abundant element in the universe. However, there are sa
compounds of helium. Why?
of what you have read in
same properties, as a
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the illustration. atoms then
the property will be same
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BE A SCIENTIST
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Write the chemical equation for the chemical reaction shown in the illustration loent
In the illustration:
The black sphere represents a carbon atom
7 The white sphere represents a hvdrogen atom.
The gray sphere represents an oxygen atom.
36 . MATERIALS

Answer 1

Answer:

Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite. Calcite is an ionic salt called calcium carbonate or CaCO3.