Periodic Properties
As a you move right across a period on the table, atomic size...
decreases
name two properties of ionic compounds
consist of positive and negative ions
• have attractions called ionic bonds between positively and negatively charged ions
• have high melting points
• are solids at room temperature
Write the electron Configuration for Barium
[ X e ] 6 s 2
As you move down a group, atomic size
increases
Given the atomic symbol, determine the number of protons, neutrons, and electrons in the following ion.
55 Co 3+
24
Write the electron configuration for Sn
[Kr] 4d¹⁰5s²5p²
As you move from bottom left corner of periodic table to top right, ionization energy....
increases
what is molecular formula for the compound formed between Na+ and Cl-
NaCl
How many unpaired electrons does oxygen have
two
Why does metallic character increases going down a group.
Metallic character is how easily it can lose electrons. Farther from nucleus, more likely to lose.
what is molecular formula for the compound formed between Al and O
Al2O3
What information does the group number in a periodic table give about the atoms in that column (1A, 2A...)
number of valence electrons.
True or false? s and p shells are valence electrons while d and f are not
true
Name the ionic compound KF
potassium fluoride
Electron configuration for pb
[Xe] 6s² 4f¹⁴ 5d¹⁰ 6p²