lesson 17 group 7 part 1 Flashcards
1
Q
what are the elements in group 7 called
A
halogens
2
Q
group 7 elements have got how many electrons in their outer energy level
A
7
3
Q
if we take two atoms of a group 7 element what occurs
A
they simply react with each other to form a covalent bond
4
Q
how can we represent a molecule
(eg fluorine)
A
F-F
5
Q
every group 7 element forms a molecule consisting of what
A
2 atoms joined by a covalent bond
6
Q
the melting and boiling points of group 7 changes as we
A
move down the group
7
Q
the melting and boiling point tell us what
A
the physical state of each halogen
(whether its a s, l, g at room temperature 20oc)
8
Q
what does the relative molecular mass essentially tell us
A
the sizes of the molecule
9
Q
as we move down group 7 the relative molecular mass what
A
increases (atoms get bigger)
