4.2 Questions Flashcards
1
Q
how many groups are in the periodic table?
A
18
2
Q
hydrogen and helium are in which period?
A
period 1
3
Q
Metal properties
A
- shiny
- ductile / malleable
- high melting point
- good conductors
4
Q
Non-metal properties
A
- dull
- brittle
- low melting point
- poor conductors
5
Q
why are elements close to the ‘step ladder’ classified as metalloids
A
because they have properties of both metals and non-metals
6
Q
what happens to the number of protons as you move right along a period
A
number of protons increase
