Atomic Structure

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Atoms and Molecules

Subtopic

Atoms and Molecules under Atomic Structure for Grade 7 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$What is the symbol for Mercury?$
A. $Me$
B. $Mg$
C. $Hg$
D. $My$
2.
$Which of these is a tetra-atomic molecule?$
A. $O_3$
B. $P_4$
C. $S_8$
D. $H_2$
3.
$The symbol for the element Tin is:$
A. $Ti$
B. $Tn$
C. $Sn$
D. $St$
4.
$H_2O$
A. $1$
B. $2$
C. $3$
D. $0$
5.
$A molecule that contains atoms of the same element is called a:$
A. $Compound molecule$
B. $Homo-atomic molecule$
C. $Hetero-atomic molecule$
D. $Radical$
6.
$Which of these is a variable valency element?$
A. $Sodium$
B. $Iron$
C. $Magnesium$
D. $Aluminum$
7.
$The path in which electrons revolve around the nucleus is called a/an:$
A. $Axis$
B. $Orbit or Shell$
C. $Nucleus$
D. $Bond$
8.
$Which particle is responsible for the chemical properties of an element?$
A. $Proton$
B. $Neutron$
C. $Electron$
D. $Nucleus$
9.
$The formula of Magnesium Nitride is:$
A. $MgN$
B. $Mg_{2}N_{3}$
C. $Mg_{3}N_{2}$
D. $Mg_{3}N$
10.
$What is the valency of Iron in 'Ferrous Sulphate'?$
A. $1$
B. $2$
C. $3$
D. $4$

Download the worksheet for Atomic Structure - Atoms and Molecules to practice offline. It includes additional chapter-level practice questions.

Radicals

Subtopic

Radicals under Atomic Structure for Grade 7 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which radical is present in Calcium Hydroxide?$
A. $H^{+}$
B. $O^{2-}$
C. $OH^{-}$
D. $CO_{3}^{2-}$
2.
$S^{2-}$
A. $Sulphate$
B. $Sulphite$
C. $Sulphide$
D. $Sulphurous$
3.
$A radical that carries a charge of +1 is:$
A. $Ammonium$
B. $Calcium$
C. $Zinc$
D. $Aluminium$
4.
$Identify the symbol for the Zincate radical.$
A. $Zn^{2+}$
B. $ZnO_{2}^{2-}$
C. $Zn(OH)_{2}$
D. $ZnO$
5.
$Ca(OH)_2$
A. $1$
B. $2$
C. $3$
D. $4$
6.
$PO_3^{3-}$
A. $1$
B. $2$
C. $3$
D. $4$
7.
$An acidic radical made of one atom of Carbon and three atoms of Oxygen with a -2 charge is called:$
A. $Carbide$
B. $Carbonate$
C. $Carbonite$
D. $Oxalate$
8.
$Which of the following formulas correctly represents a salt where both the basic and acidic radicals are trivalent?$
A. $FeCl_3$
B. $AlPO_4$
C. $Na_3PO_4$
D. $Al_2(SO_4)_3$
9.
$Sn_3(PO_4)_2$
A. $2$
B. $3$
C. $4$
D. $5$
10.
$Identify the 'ide' radical that is polyatomic.$
A. $Oxide$
B. $Sulphide$
C. $Cyanide$
D. $Nitride$

Download the worksheet for Atomic Structure - Radicals to practice offline. It includes additional chapter-level practice questions.

Valency

Subtopic

Valency under Atomic Structure for Grade 7 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$Ni$
A. $1$
B. $3$
C. $4$
D. $2$
2.
$AgCl$
A. $1$
B. $2$
C. $3$
D. $4$
3.
$AuCl_3$
A. $1$
B. $2$
C. $3$
D. $4$
4.
$Ba$
A. $1$
B. $2$
C. $3$
D. $4$
5.
$Na_2CO_3$
A. $2$
B. $1$
C. $3$
D. $4$
6.
$Si$
A. $2$
B. $1$
C. $4$
D. $3$
7.
$If an element is termed 'Trivalent', it means its valency is:$
A. $1$
B. $2$
C. $3$
D. $4$
8.
$Which of these elements has the same valency as Carbon but a different atomic number?$
A. $Silicon$
B. $Oxygen$
C. $Nitrogen$
D. $Boron$
9.
$OH$
A. $1$
B. $2$
C. $3$
D. $0$
10.
$X$
A. $X_3N_2$
B. $XN$
C. $X_2N_3$
D. $XN_2$

Download the worksheet for Atomic Structure - Valency to practice offline. It includes additional chapter-level practice questions.

Chemical Formulae

Subtopic

Chemical Formulae under Atomic Structure for Grade 7 ICSE.

About Topic & Revision

Preview questions (no answers)

1.
$Which of these is the correct chemical formula for Sulphuric Acid?$
A. $H_2S$
B. $H_2SO_3$
C. $H_2SO_4$
D. $HSO_4$
2.
$What is the valency of Aluminum?$
A. $1$
B. $2$
C. $3$
D. $4$
3.
$N$
A. $Neon$
B. $Nickel$
C. $Nitrogen$
D. $Sodium$
4.
$What is the chemical formula for Methane?$
A. $CH_2$
B. $C_2H_2$
C. $CH_4$
D. $CH_3$
5.
$Which of the following radicals carries a positive charge?$
A. $Sulphate$
B. $Carbonate$
C. $Ammonium$
D. $Nitrate$
6.
$MO$
A. $MPO_4$
B. $M_3(PO_4)_2$
C. $M_2(PO_4)_3$
D. $M(PO_4)_2$
7.
$P_2O_5$
A. $Dioxide$
B. $Trioxide$
C. $Tetroxide$
D. $Pentoxide$
8.
$If a metal 'M' is divalent, what is the formula of its nitrate?$
A. $MNO_3$
B. $M_2NO_3$
C. $M(NO_3)_2$
D. $M_3(NO_3)_2$
9.
$What is the chemical formula for the compound Nitrogen Tri-iodide?$
A. $N_3I$
B. $NI$
C. $NI_2$
D. $NI_3$
10.
$Which of the following is the correct formula for Sodium Aluminate?$
A. $NaAlO$
B. $Na_2AlO_2$
C. $NaAlO_2$
D. $Na_3AlO_3$

Download the worksheet for Atomic Structure - Chemical Formulae to practice offline. It includes additional chapter-level practice questions.