C2. Periodic Table Flashcards
1
Q
How are elements arranged on the periodic table?
A
- order of atomic number
- groups have similar properties as they have the same number of electrons in outer shell
- group number equals number of electrons in outer shell
2
Q
Group 1…
A
- melting and boiling point decreases going down the group
- all react with water to produce hydrogen and an alkali solution containing metal hydroxide
- reactivity increases going down group
3
Q
Group 7…
A
- halogens form ions with single negative charge i their ionic compounds with metals
- covalent compounds
- more reactive halogen can displace less reactive from a solution of one of its salts
- reactivity decreases going down group
4
Q
Electrostatic attraction depends on?
A
- distance between outermost electrons and nucleus
- number of occupied inner shells
- size of positive charge n nucleus