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CBSE Notes 2011-2012 » IX-Science-Term2

Structure of the Atom

An atom with 3 protons and 4 neutrons will have a valency of

Multiple choice question

An atom with 3 protons and 4 neutrons will have a
valency of

The electron distribution in an aluminium atom is

Multiple choice question

The electron distribution in an aluminium atom is

Which of the following statement is always correct ?

Multiple choice question

Which of the following statement is always correct ?

Atomic models have been improved over the years. Arrange the following atomic models in the order of...

Multiple choice question

Atomic models have been improved over the years.
Arrange the following atomic models in the order
of their chronological order
(i) Rutherford's atomic model
(ii) Thomson's atomic model
(iii)Bohr's atomic model

Which of the following statements about Rutherford's model of atom are correct ? ...

Multiple choice question

Which of the following statements about
Rutherford's model of atom are correct ? (i)Considered the nucleus as positively charged (ii)Established that the a-particles are four times
as heavy as a hydrogen atom (iii)Can be compared to solar system (iv)Was in agreement with Thomson's model.

Which of the following are true for an element ? (i) Atomic number = number of protons + number of e...

Multiple choice question

Which of the following are true for an element ?
(i) Atomic number = number of protons + number
of electrons
(ii) Mass number = number of protons + number
of neutrons
(iii) Atomic mass = number of protons = number
of neutrons
(iv) Atomic number = number of protons = number
of electrons

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