Campechano 1
Who "invented" the PTE?
Dimitri Mendeleev
The only letter you can't find in the PTE is ____
How many valence electrons do the halogens have?
7 valence electrons
Name 3 physical props. for metals
Malleable, ductile, shiny, solid at RT (except HG), good conductors (heat and electricity)
Choose the element with the highest metallic character: Be, Li, O, N
Li, lithium
In the PTE the columns are known as ______
Groups or families
Name the properties that increase down and to the left
Atomic radius and metallic character
How many valence electrons does the Icosagens family have?
3 valence electrons
Choose the metalloid: O, Mg, Si, F
Si, silicon
Choose the element with the biggest atomic radius: Ra, Mg, Be, Sr
Ra, radium
In the PTE, rows are known as ______
Periods
______ is the energy required to remove an electron from a neutral atom.
Ionization energy
How many valence electrons does an element with Z=15 have?
5 valence electrons
Choose the metal: I, As, N, Ca
Ca, calcium
Choose the element with the highest electronegativity value: Ag, Sr, I, Cd
I, iodine
Maximum value for the valence level
7
Maximum number of electrons in the valence level
8
Given the complete electron conf. for chlorine: 1s22s22p63s23p5
What is the value for the valence level?
3 (same as the period)
Choose the non-metal: Cr, Ga, N, Sb
N, nitrogen
Choose the element with the lowest ionization energy value: Si, Ga, Cd, Au
Au, gold
Which groups of elements are called the representative families?
"A" groups
____ is the highest possible value for electronegativity
4. 0
Given the complete electron conf. for galium: [Ar]3d104s24p1
How many valence electrons does it have?
3 valence electron
Name 2 chemical props. for metals
- In combination with oxygen they form metallic oxides.
- In combination with water, they form hydroxides.
Name the following elements according to the increasing metallic character: Ca, Ti, Ni, K
K, Ca, Ti, Ni