Question # 1

Atom is electrically

Choose an answer

Positive particle

Negaitve particle

Neutral particle

None of these

An element has 5 electrons in M shell. Its tomic number is.

Choose an answer

5

10

15

20

Number of protons in the nucleus of an atom is called.

Choose an answer

Atomic number

Mass Number

Mass Unit

Electron Number

Why has isotopes not been shown int he periodic table.

Choose an answer

Isotopes do not show periodic behavior

Periodic tble cannot accomodate a large number of isotopes of different elements

All the isotops have same atomic number so there is no need to give them separate places

Someof the isotopes are unstble and they give rise to different elements.

What will be the relative atomic mass of nitrogen given the abundance of its two isotopes, ¹⁴ N and ¹⁵N are 99.64 and 0.35

Choose an answer

14.0210

14.2100

14.0021

14.1200

Carbon -14 is used for the

Choose an answer

Growth of bones

Diagonosis of goiter

Age determination of old objects

All of these

Chlorine has two isotopes, both of which have

Choose an answer

Same mass Number

Same number of electrons

Same number of neurtons

Different number of protons

How many electrons can be accommodated at the most in the third shell of the elements.

Choose an answer

8

10

18

32

Rutherford used a gold foil in his experiment, which had a tickness of

Choose an answer

0,0002 cm

0,0001 cm

0.001 cm

0.00004cm

In which isotope of oxygen there are the equal numbr of protons electons and neutorns.

Choose an answer

O¹⁶

¹⁷O

¹⁸O

None of these

²³⁸U₉₂ has number of neutrons.

Choose an answer

92

146

238

330

John Dalton put forward his atomic theory.

Choose an answer

1800

1803

1805

1903

More Classes

Other Links

Chemistry 9th Class English Medium Unit 2 Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer