The Periodic Table
Click on the correct answer
1
The Modern Periodic law states that
The elements are arranged according to their increasing atomic masses.
Elements are arranged in groups according to their chemical properties
No two elements can have the same chemical properties
The properties of the elements are a periodic function of their atomic numbers.
The atom is mostly empty space.
2
Which of the following people organized the elements on the basis of atomic mass and noticed that every eighth element had similar properties?
Newlands
Dobereiner
Mendeleev
Mosely
Rutherford
3
The halogens as a group tend to
have seven valance electrons; be solids; gain an electron to complete the octet.
have seven valance electrons; be gases, gain an electron to complete the octet.
have seven valance electrons; be gases; lose an electron to complete the octet.
Have five valance electrons; be gases; gain three electrons to complete the octet.
Have five valance electrons; be liquids; gain three electrons to complete the octet.
4
Metals tend to _________ electrons to complete the octet.
destroy
split
share
gain
lose
5
The most stable elements on the periodic chart are the _______________ because they have _______________.
alkaline earth metals. the ability to lose electrons.
transition elements. their d-orbitals filling and filled.
noble gases. eight valance electrons
halogens. completed the octet.
Actanoids. they have their f-orbitals filling and filled
6
What happens to the atomic radius of atoms as you go from the top of the chart tot he bottom of the chart?
The atoms get larger.
The atoms get smaller.
The radii stays the same.
The atoms get larger, then smaller.
There is no way to tell what happens to the radii of atoms.
7
The periodic trend of decreasing atomic radii as you move across the period is a function of
gravity
increasing numbers of energy levels.
decreasing number of protons.
increasing numbers of outer electrons.
increasing nuclear charge.
8
Electronegativity is defined as
the attraction elements have for each other in a chemical bond.
the amount of energy required to remove a valance electron.
the amount of energy released when an atom gains an electron.
the amount of heat energy required to raise the temperature of 1.0 gram of water.
the charge on the atom.
9
Why is the first ionization energy for the element argon so much higher than the first ionization energy of chlorine?
Argon is a smaller atom.
Chlorine is a metal.
Chlorine is a nonmetal
Argon is a stable element and thus takes more energy to deconstruct the octet.
Argon has a half filled energy sublevel.
10
Which of the following elements is most reactive?
Li
Na
K
Rb
Cs