Ch 25 II Flashcards
(33 cards)
Because metals have valence electrons that move freely, metals are also
Good conductors of heat and electricity
Nonmetals are generally
Brittle and show little to now metallic luster
List properties of nonmetals:
- High ionization energies
- High electronegativities
- Poor conductors
- Able to gain electrons easily
Metalloids / semimetals have properties that
Fluctuate widely
How are the electronegativities and ionization energies of metalloids of semimetals?
They lie between metals and nonmetals
Acid-base reactions and redox reactions occur in
Ionic solutions
The hydride ion is far too reactive to
Exist in water
What has the largest atomic radii of all the elements in their respective periods
Alkali metals
Alkali metals have metallic properties and high reactivity are due to
Low ionization energies
Alkaline earth metals have both
Low electronegativities and positive electron affinities
Carbon does not form ions. Rather, it participates in
Electron sharing
Group VA forms covalent bonds with how many per atom?
Three
Group VIA is fairly
Electronegative
Halogens are highly reactive nonmetals that form which anion
-1
The electronegativities of halogens are
Very high
Halogens are reactive towards
Alkali metals and Alkaline earths
Noble gases have what kind of boiling points?
Low
Transition metals are hard elements with
High melting points and boiling points
Transition metals are held loosely by the nucleus and are mobile, contributing to
Malleability and high conductivity
What kind of ionization energies do transition elements have?
Low
Elements in a given period have
The same principle quantum number
Arrange the following in terms of increasing atomic radius:
Sr, P, Mg2+, Mg
Sr > Mg > P > Mg2+
What is the electron configuration for the outermost electrons of elements in Group IVB?
Group IV = 4 electrons lie outside of noble gas configuration
B = Nonrepresentative, aka s and d
So, s2 d2
The order of the elements in the periodic table is based on
Atomic number
