Chemistry Flashcards
0
Q
Reactivity trend?
A
More shells
Outer shell further from nucleus
Electron has weaker attraction to nucleus requires less energy to remove electron
1
Q
Alkali reaction with a metal?
A
Produce metal hydroxide and hydrogen
Observations:metal disappears
Solution produced is alkaline: turns UI blue
2
Q
Group 7- physical state and appearance?
A
Fluorine- very pale yellow gas Chlorine- pale green gas Bromine- brown liquid Iodine- grey solid Astatine- black solid
3
Q
Halogen vs Halide
A
Halogen= diatomic element. ____ine, with 7e- in outer shell
Halide= ion formed when halogen gains e-
