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Patterns in Periodic Table
Patterns in Periodic Table
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Principles of Chemistry
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15 cards
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1
Why is the 1st ionisation energy of phosphorus greater than 1st ionisation energy of silicon?
The outer electron in a phosphorus atom is paired.
The outer electron in a phosphorus atom is more shielded.
A phosphorus atom has one more proton in its nucleus.
The atomic radius of a phosphorus atom is greater.
2
Which of the following statements is true?
The oxygen atom is larger than the oxide ion.
The chloride ion is smaller the chlorine atom.
The potassium ion is larger than the potassium atom.
The sodium atom is larger than the sodium ion
3
Isotopes of an element have
the same number of neutrons
different number of neutrons
the same mass number
equal numbers of protons and neutrons
4
Which species has the largest radius?
K+
Cl-
P3-
Ar
5
Which of the following elements has the greatest electronegativity?
Oxygen
Fluorine
Caesium
Iodine
6
Which of the following equations represents the first ionisation energy of fluorine?
F-(g) --> 1/2 F2(g) + e-
F- (g) --> F(g) + e-
F(g) --> F+(g) + e-
F(g) --> F2+(g) + 2e-
7
When an atom X of an element in Group 1 reacts to become X+
The atomic number of X decreases
The mass number of X increases
The shielding effect increases
The number of occupied energy levels dcreases
8
Which of the following atoms has least attraction for bonding electrons?
Phosphorus
Nitrogen
Silicon
Carbon
9
As the atomic number of the alkali metals increases
the density decreases
the melting point increases
the atomic size decreases
the 1st ionisation energy decreases
10
A potassium atom is larger than a sodium atom because potassium has
a larger nucleus
larger nuclear charge
more occupied energy levels
a smaller ionisation energy
11
The ionisation energies of element: 870 1800 3000 3600 5800 7000 13200. What is X?
As
Zr
Te
I
12
The following species contain same number of electrons. In which order do their radii increase?
Ca2+ --> Ar --> K+
K+ --> Ar --> Ca2+
Ca2+ --> K+ --> Ar
Ar --> K+ --> Ca2+
13
In which group of Periodic Table would you expect to find this element, [Rn] 5f14 6d10 7s2 7p6
VI
18
IV
II
14
Different isotopes of the same element have identical
number of neutron
nuclei
electron arrangement
mass number
15
A positively charged particles with electron arrangement 2.8 could be
a neon atom
a fluoride ion
an aluminium ion
a sodium atom
