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WorksheetsPeriodicity
Total questions: 24
Worksheet time: 13mins
Which pair of elements reacts most readily?
Li + Br2
Li + Cl2
K + Br2
K + Cl2
The compounds Na2O, Al2O3 and SO2 respectively are
acidic, amphoteric and basic.
amphoteric, basic and acidic
basic, acidic and amphoteric
basic, amphoteric and acidic
Which of the following properties of the halogens increase from F to I? *
I. Atomic radius, II. Melting point, III. Electronegativity
I only
I and II only
I and III only
I, II and III
For which element are the group number and the period number the same?
Li
Be
B
Mg
Which of the physical properties decrease with increasing atomic number for both the alkali metals and the halogens?
I. Atomic radius
II. Ionization energy
III. Melting point
I only
II only
III only
I and III only
Which of the reactions below occur as written? *
I. Br2 + 2I– → 2Br– + I2
II. Br2 + 2Cl– → 2Br– + Cl2
I only
II only
Both I and II
Neither I or II
Rubidium is an element in the same group of the periodic table as lithium and sodium. It is likely to be a metal which has a
high melting point and reacts slowly with water.
high melting point and reacts vigorously with water.
low melting point and reacts vigorously with water.
low melting point and reacts slowly with water.
When the following species are arranged in order of increasing radius, what is the correct order?
Cl–, Ar, K+
K+, Ar , Cl–
Cl–, K+, Ar
Ar, Cl–, K+
What increases in equal steps of one from left to right in the periodic table for the elements lithium to neon?
the number of occupied electron energy levels
the number of neutrons in the most common isotope
the number of electrons in the atom
the atomic mass
Which property decreases down group 17 in the periodic table?
atomic radius
electronegativity
ionic radius
melting point
Which properties are typical of most non-metals in period 3?
I. They form ions by gaining one or more electrons.
II. They are poor conductors of heat and electricity.
III. They have high melting points.
I and II only
I and III only
II and III only
I, II and III
A potassium atom has a larger atomic radius than a sodium atom. Which statement about potassium correctly explains this difference?
It has a larger nuclear charge.
It has a lower electronegativity.
It has more energy levels occupied by electrons.
It has a lower ionization energy.
Which factors lead to an element having a low value of first ionization energy?
I. large atomic radius
II. high number of occupied energy levels
III. high nuclear charge
I and II only
I and III only
II and III only
I, II and III
Which statement about electronegativity is correct?
Electronegativity decreases across a period.
Electronegativity increases down a group.
Metals generally have lower electronegativity values than non-metals.
Noble gases have the highest electronegativity values.
Which statement is correct for a periodic trend?
Ionization energy increases from Li to Cs.
Melting point increases from Li to Cs
Ionization energy increases from F to I
Melting point increases from F to I
Which equation represents the first ionization energy of fluorine?
F(g) + e– --> F–(g)
F–(g) --> F(g) + e–
F+(g) --> F(g) + e–
F(g) --> F+(g) + e–
Which element is a transition metal?
Ca
Cr
Ge
Se
When Na, K, and Mg are arranged in increasing order of atomic radius (smallest first), which order is correct?
Na, K, Mg
Na, Mg, K
K, Mg, Na
Mg, Na, K
Which oxides produce an acidic solution when added to water?
I. SiO2
II. P4O10
III. SO2
I and II only
I and III only
II and III only
I, II and III
Where are the halogens found in the periodic table?
1
2
17
18
Are the lanthanides metals?
Yes
No
Check all possible observations that could be made during the reaction of sodium and water:
An alkaline solution is formed
The metal melts
Hydrogen gas is formed
An acidic solution is formed
Fizzing
What is periodicity?
A description of the periodic table
The organization of elements into the periods
The repeating pattern of physical and chemical properties of elements
Which of the following elements is NOT a noble gas?
Helium
Nitrogen
Krypton
Neon
