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Worksheetsquiz11 sec2
Total questions: 20
Worksheet time: 2hrs 40mins
Which of the following relations is correct? The radius of …………
X+ ion > that of X- ion.
X- ion > that of X atom
X+ ion > that of X- ion.
X+ ion > that of X atom
Which of the following best describes a period in the Periodic Table?
A collection of elements in a single column
A collection of elements in a single diagonal
All elements with a specific number of neutrons in their nuclei
All nonmetals
A collection of elements in a single row
If the length of the bond in A2 molecule equals 1.98 A°, and its length in AB molecule equals 1.29A°, what is the bond length in B2 molecule?
0.69 A°
3.27 A°
1.32 A°
0.6 A°
Which of the following choices is more accurate in representing the ratio of the atomic radius of sodium to its ionic radius (both estimated in picometer)?
138/235
190/102
144/143
As the atomic radius …………… in the alkali metal group, the attraction force between the nucleus and the valence electrons …………… and it becomes easy to lose it.
increases, decreases
increases, remains the same
decreases, decreases
increases, increases
Which of the following equations correctly shows the first electron affinity of an atom?
X-(g) → X(g) + e-
X-(g) + e- → X(g)
X(g) + X(g) → X+(g) + X-(g)
X(g) → X+(g) + e-
X(g) + e- → X-(g)
Which of the following information Berzelius might relied on in his classification of the elements? ………
Atomic number of the elements.
Electronic configuration of the elements.
Degree of electricity and heat conductivity.
The quantum numbers of the last electron in each element
Arsenic 33As and antimony 51Sb are similar in ………
both being from the fourth period elements.
both being from group (5A).
their electric conductivity being higher than that of metals.
the four quantum numbers of the last electron in the atom of each of them.
What products are formed when sodium oxide reacts with hydrochloric acid?
NaCl, H2, and O2
NaCl and H2O
Na and HClO
Na, O2, H2, and Cl2
A metal oxide and an acid reacted together to form zinc chloride and water. What were the metal oxide and the acid?
Zinc oxide and hydrochloric acid
Zinc oxide and sulfuric acid
Zinc metal and nitric acid
Zinc metal and hydrochloric acid
Zinc chloride and zinc oxide
Which of the following choices includes a nonmetal, a metal and a metalloid respectively? ……………
H, Zn, I
Zn, I, Br
Zn, Cu, Si
I, Zn, Si
What is the equation representing the electron affinity of fluorine (F)?
F-(g) + e- → F(g)
F(g) → F+(g) + e-
F-(g) → F(g) + e-
F(g) + e- → F-(g)
What is the estimated atomic radius of hydrogen if you know that the bond length in a chlorine molecule is 1.98 Å and the bond length in a hydrogen chloride molecule is 1.27 Å?
0.28 Å
0.64 Å
0.77 Å
0.71 Å
Which of the following choices represents the proper graduation in electronegativity?
6C <7N <14Si <15P
14Si <15P <6C <7N
7N <6C <15P <14Si
6C <14Si <7N <15P
The highest number of the unpaired electrons is in …...........
[Atomic number of iron = 26]
Fe
Fe4+
Fe2+
Fe3+
If the ionization potential of hydrogen H(g) equals +1312 KJ/mol, it is most likely that the second ionization potential of helium He(g) equals ……….
+5248 KJ/mol
+1312 KJ/mol
+656 KJ/mol
+328 KJ/mol
An element with atomic number 42, the number of its half filled orbitals is ...
1
4
5
6
Which element is represented by Z and forms a Z2+ ion with an electronic configuration of 1s12s22p6?
Magnesium
Calcium
Sodium
Beryllium
The electrons of the atom of a representative element occupy 3 principal levels, and the last sublevel contains number of electrons double their number in the first principal level, what is the atomic number of this element?
16
17
18
19
nonmetal ion of an unknown element has the formula X3–. If atoms of X have 7 protons, what is the electronic configuration of X3–?
1s22s22p5
1s22s22p6
1s22s22p3
1s22s1
