Transcript Problem-Solving Lab: Francium-

Problem-Solving Lab:
Francium--Solid, Liquid, or gas?
• Of the first 101 elements, francium is the
least stable. Its most stable isotope has a
half-life of just 22 minutes! Use
knowledge about the properties of other
alkali metals to predict some of
francium’s properties.
• 1. Using the periodic law as a guide,
graph the trends for each of the
properties given in the following table.
• 2. Predict whether francium is a solid,
liquid, or gas at room temperature.
Element
Melting
Point (oC)
Boiling
Point
(oC)
Radius
(pm)
lithium
180.5
1346
152
sodium
97.8
897
186
potassium
63.3
766
227
rubidium
39.31
688
248
cesium
28.4
647.8
265
francium
?
?
?
Question Set
1. Explain why elements in the same group
on the periodic table have similar chemical
properties.
2. Given each of the following valence
electron configurations, determine which
block of the periodic table the element is in.
4
2
1
2
1
2
1
a. s p
b. s
c. s d
d. s p
3. Without using the periodic table, determine
the group, period, and block of an atom with
the electron configuration of [Ne]3s23p4.
4. Make a simplified sketch of the periodic