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WorksheetsBasic concept of chemical bond
Total questions: 10
Worksheet time: 10mins
Which of the following statements best explains why neon, argon and krypton exist as monoatomic gases?
They are stable
They are inert in nature
They have 8 valence electrons
They are found in Group 18 of the PTOE
Helium has only one electron shell and is filled with 2 electrons. This known as __________ electron arrangement.
octet
krypton
duplet
argon
________ bond is formed by the sharing of valence electrons in non-metal atoms.
Chemical
Ionic
Covalent
Hydrogen
Ionic bond is a bond formed when
Non-metal atoms share electrons in a molecule
A non-metal atom transfers electrons to metal atom
A metal atom transfer an electron to a non-metal atom
Van der Waals forces attract the non-metal atoms
Which of the following proton numbers belongs to an element that does not form chemical bonds?
8
12
18
20
Oxide and fluoride ions have the same number of _________________________
[Proton number: O = 8, F = 9]
Charge
Electrons
Neutrons
Protons
Among the following, which have the same number of electrons?
[Proton number: F= 9, Na= 11, Mg= 12, Cl= 17, K= 19]
Na+ and K+
F- and Cl-
Na+ and Mg2+
Na+ and Cl-
Table 1 shows the proton number and number of electrons of several particles.
Which of the following particles is a cation?
P
Q
R
S
Which of the following particles contain 18 electrons?
[Proton number: Al= 13, Cl= 17, K= 19, Ca= 20]
I. K+
II. Ca
III. Cl-
IV. Al3+
I and II only
I and III only
I,II and III only
II,III and IV only
Which of the following pairs of ions have the same electron arrangement?
[Proton number: H= 1, Li= 3, O= 8, Na= 11, Cl= 17, K= 19]
H+ and Li+
Na+ and O2-
Na+ and K+
Na+ and Cl-
