# 9th Class Science Structure of the Atom Question Bank

### done Structure of the Atom

• A) $_{6}^{12}C$and$_{6}^{14}C$

B) Carbon dioxide and carbon monoxide

C) Diamond and graphite

D) ${{C}_{2}}{{H}_{4}}$and${{C}_{3}}{{H}_{6}}$

• A) $2,\,\,1$

B) $2,\,\,4$

C) $2,\,\,5$

D) $2,\,\,7$

• A) $^{238}X$has $3$ more protons and $3$ more electrons than$235$.

B) $^{238}X$ has $3$ more protons, but same number of electrons as$235$.

C) $^{238}X$ has $3$ more neutrons, but the electrons or protons are same as$235$.

D) $^{238}X$ has $3$ more protons, but same number of electrons as$235$.

• A)

 Protons Neutrons Electrons 17 20 17

B)

 Protons Neutrons Electrons 17 18 16

C)

 Protons Neutrons Electrons 18 18 17

D)

 Protons Neutrons Electrons 20 18 17

• A) $_{4}^{9}Be$

B) $_{4}^{9}F$

C) $_{4}^{9}B$

D) $_{4}^{9}O$

• A) $11$ electrons

B) $12$ neutrons

C) $23$ protons

D) $23$ neutrons

• A) An atom of helium contains two electrons.

B) An atom of helium has two protons and four neutrons in its nucleus.

C) The proton (atomic) number of helium is four.

D) Helium acts as a diatomic molecule.

• A) Chlorine

B) Sodium

C) Rubidium

D) Xenon

• A) Number of nucleons

B) Number of electrons

C) Number of neutrons

D) Number of protons

• A) The combining capacity of an element

B) The atomicity of an element

C) The oxidation number of an element

D) All of the above

• A) $16$

B) $17$

C) $18$

D) $19$

• A) $X$ and $Y$ are the same elements.

B) $X$ and $Z$ are the same elements.

C) $X$ has more protons than $Y$.

D) $Z$ has more neutrons than$Y$.

• A) $32$

B) $18$

C) $2$

D) $8$

• A) $27:13$

B) $10:13$

C) $20:24$

D) $10:14$

B) About the shape of sub-levels

• A) Most of the $\alpha -$particles passed straight.

B) Most of the $\alpha -$particles rebounded after hitting the atoms.

C) Only a few $\alpha -$particles deflected away from their path.

D) Most of the $\alpha -$particles rebounded.

• A) $Be(4)=2,\,\,2$

B) $O(8)=2,\,\,6$

C) $S(16)=2,\,\,6,\,\,8$

D) $P(15)=2,\,\,8,\,\,5$

• A) $11,\,\,12,\,\,13$

B) $11,\,\,11,\,\,12$

C) $11,\,\,11,\,\,13$

D) $11,\,\,14,\,\,15$

• A) $2,\,\,8,\,\,2$

B) $2,\,\,8,\,\,6$

C) $2,\,\,8$

D) $2,\,\,8,\,\,8,\,\,2$

• A) $20$

B) $21$

C) $17$

D) $37$

• A) Only the number of protons

B) The number of protons and neutrons

C) The number of protons and electrons

D) Only the number of neutrons

• A) $10$

B) $12$

C) $22$

D) $32$

• A) Isobars

B) Isotopes

C) Isotones

D) Isomers

• A) Neutron has the highest mass among the fundamental particles.

B) The mass of an electron is negligible.

C) The value of e/m is the highest for a proton.

D) Charge of a neutron is zero.

• A) It is constant.

B) It depends on the gas taken in the discharge tube.

C) It depends on the nature of cathode and anode taken.

D) It depends on the fluorescent material coated on the screen.

• A) A neutral atom

B) An isotope

C) A cation

D) An anion

• A) $82$ protons and $82$ electrons

B) $82$protons and $126$ neutrons

C) $82$protons, $82$ electrons and $126$ neutrons

D) $82$neutrons, $126$ protons and $126$ electrons

• A) $M{{g}^{2+}}$

B) $N{{a}^{+}}$

C) ${{O}^{2-}}$

D) ${{F}^{-}}$

• A) Oxygen

B) Nitrogen

C) Helium

D) Hydrogen

• A) ${{D}^{+}}$

B) ${{H}^{+}}$

C) $He$

D) $L{{i}^{+}}$

• A) ${{n}^{2}}$

B) $2{{n}^{2}}$

C) $2n$

D) $4n+1$

• A) $19$ protons $+\,\,20$ neutrons $+\,\,19$ electrons

B) $19$ protons $+\,\,20$ neutrons $+\,\,20$ electrons

C) $20$ protons $+\,\,19$ neutrons $+\,\,20$ electrons

D) $20$ protons $+\,\,20$ neutrons $+\,\,19$ electrons

• A) Same size

B) Same number of electrons

C) Same electronic configuration

D) Same number of protons

• A) (i) - 2, (ii) - 3, (iii) ? 4

B) (i) - 1, (ii) - 4, (iii) ? 6

C) (i) - 2, (ii) - 2, (iii) ? 6

D) (i) - 3, (ii) - 4, (iii) ? 5

• A) $P$and$Q$

B) $P$ and $R$

C) $Q$and$R$

D) $P,\,\,Q$and$R$

• A) Hydrogen

B) $H{{e}^{+}}$

C) Helium

D) Deuterium

• A) $3,\,\,1$

B) $5,\,\,8$

C) $4,\,\,1$

D) $5,\,\,7$

• A) $2,\,\,8,\,\,6,\,\,4$

B) $2,\,\,8,\,\,7,\,\,3$

C) $3,\,\,7,\,\,7,\,\,3$

D) $2,\,\,8,\,\,8,\,\,2$

• A) electrons

B) protons

C) neutrons

D) nucleons

• A) $3:7$

B) $7:3$

C) $3:4$

D) $6:28$

• A) A lump of positive charge

B) A lump of small atoms

C) A lump of neutrons

D) The nucleus

• A) The total mass of an atom is concentrated at the centre of the atom.

B) Nucleus is located inside the atom containing positively charged particles.

C) Most of the atom is empty in space.

D) Electrons revolve around the nucleus in stationary, circular orbits.

• A) $_{7}^{15}N,\,\,_{8}^{16}O$

B) $_{6}^{13}C,\,\,_{7}^{14}N$

C) $_{6}^{13}C,\,\,_{7}^{13}N$

D) $_{6}^{13}C,\,\,_{8}^{15}O$

• A)

 Protons Neutrons Electrons 1 2 1

B)

 Protons Neutrons Electrons 1 3 2

C)

 Protons Neutrons Electrons 2 1 2

D)

 Protons Neutrons Electrons 2 3 2

• A) Only (i)

B) Only (i) and (ii)

C) Only (i) and (iii)

D) (i), (ii) and (iii)

• A) $_{8}^{16}X$

B) $_{10}^{20}X$

C) $_{11}^{23}X$

D) $_{9}^{19}X$

• A) $19:12$

B) $5:3$

C) $5:6$

D) $4:3$

• A) $P$

B) $Q$

C) $R$

D) $S$

• A) Isotopes have the same proton number.

B) Isotopes have the same chemical properties.

C) Isotopes have the same nucleon number.

D) Atoms of the isotopes of the element have the same number of electrons.

• A)

 P Q $CO$ $C{{O}_{2}}$

B)

 P Q ${{N}_{2}}{{O}_{3}}$ ${{N}_{2}}{{O}_{5}}$

C)

 P Q ${{H}_{2}}O$ ${{H}_{2}}{{O}_{2}}$

D)

 P Q $C{{H}_{4}}$ ${{C}_{3}}{{H}_{8}}$