Chemistry facts Flashcards
1
Q
Alkali metals
A
Low density (than water)
Charge of +1
Release hydrogen when reacting with water + form hydroxide that makes water alkaline
2
Q
Transition metals
A
Higher melting points Stronger and harder Less reactive (less vigorous reaction)
3
Q
Characteristics of transitional metals
A
Different charges
Variable color
Useful catalyst
4
Q
Reactivity
A
metal - lose electrons - better far away
non metal - gain electrons - better close
5
Q
Hard water
A
Water with Ca2+ or Mg2+ ions
Hard to form lather
contains dissolved compounds
Produced when came in contact with rocks
6
Q
Temporary hard water
A
HCO3-
Removed by heating
7
Q
Permanent hard water
A
Sodium carbonate
Ion exchange column
