C1 Atoms (Part 3) Flashcards
Explain: Solute, solvent, solution
A solute is a substance that is dissolved in a solvent. Together, they form a
solution.
Explain: Soluble, Insoluble
Soluble refers to the substance that can be dissolved in a solvent, e.g. salt in
water. Insoluble substance won’t dissolve in a particular solvent.
The columns of the periodic table are called?
The rows of the periodic
table are called…?
Columns –> Groups
Rows –> Periods
Are elements in the same group similar or
different?
They may have similar chemical properties, as they have the same
number of outer shell electrons.
In terms of energy levels, what are
the differences between elements
of the same period?
They have the same number of energy levels
Electrons occupy particular energy
levels, with each electron in an atom at a
particular energy level; which available
energy level do electrons occupy?
The lowest available energy level
The elements of Group 0
are more commonly known
as…?
The noble gases
What makes the periodic
table periodic?
Similar properties of elements occur at regular intervals
Elements in the same group have the
same number of electrons in their outer
shell; what does this tell us about their
chemical properties
They have similar chemical properties
In terms of shells, what is the
difference between elements
in the same period?
They have the same number of shells
What change in shell
number is seen as one
moves down a group?
The number of shells increases
Early periodic tables were
incomplete and elements were
placed in inappropriate groups if
what was to be followed?
The strict order of atomic weights
What did knowledge of isotopes allow people to explain?
Why the order based on atomic weights was not always correct.
Mendeleev overcame some
problems with the table by doing
what? He also changed the order
of some elements based on what?
Leaving gaps; atomic weights
The majority of elements
are…?
Metals
