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Chemistry Class 6: Elements and Symbols

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Questions and Answers

What is the significance of the formula of CaCO3?

It represents the qualitative and quantitative composition of a substance (correct)

It represents the atomic weights of the elements

It represents the number of atoms in a molecule

It represents the name of the element

What is the symbol for Boron?

B (correct)

What is the atomic weight of oxygen?

16 (correct)

What is the name of the element represented by the symbol 'P'?

Phosphorus Signup and view all the answers

How are symbols for elements written?

Only capital letters are used Signup and view all the answers

Why are two letters used to represent some elements?

Because the names of the two elements start with the same letter Signup and view all the answers

What is the molecular weight of CaCO3?

40 + 12 + 48 Signup and view all the answers

What is the formula of calcium carbonate?

CaCO3 Signup and view all the answers

What does the symbol 'I' represent?

Iodine Signup and view all the answers

How many parts by weight of oxygen are in one mole of calcium carbonate?

48 parts Signup and view all the answers