Recent questions

0 like 0 dislike

1 answer 79 views

What is the significance of the symbol of elements in chemical formula?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 67 views

How and which element with its isotopes use to determine the structure and chemical reaction?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 96 views

How is the goiter in thyroid gland detected?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

0 answers 63 views

How can you define monoatomic and polyatomic ion. Give example?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 61 views

Give one example each of the use of radioactive isotope in medicine and radiotherapy?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 61 views

Define Science?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 76 views

If an element has atomic number 13 and atomic mass 27;how much electrons are there in each atom of elements?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 467 views

Why does an electron first fill 2p orbital and then 3s orbital?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 91 views

Write any four properties of cathode rays?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 121 views

Define symbol. Give an example?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 78 views

Define Nobel gases. Give example?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 82 views

Define nuclear fission reaction.

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 100 views

Define metal. Give example?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 76 views

Define Chemistry?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 75 views

Give three properties of positive rays

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 94 views

Define substance. Give an example.

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

0 answers 60 views

Give the applications of isotopes in the field of radiotherapy and medicines

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 88 views

What is Rutherford's atomic model? what were the main defects in it?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 104 views

How are cathode rays produce? What are its five major characteristics?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

0 like 0 dislike

1 answer 127 views

How will you differentiate between Rutherford`s atomic theory and Bohr`s atomic theory?

asked Nov 21, 2018 in Chemistry by danish (1.0m points)

Categories