|
54 State the general
trend for the atomic radius of the
first seven elements in Period 3
when considered in order from left
to right. [1]
| Answer-->
As you go left to right
in period 3, atomic
radius decreases. |
55 State, in terms
of valence electrons, why
aluminum and sulfur have
different chemical properties.
[1]
| Answer--> They
have a different number
of valence electrons. |
56 Identify the element in
Period 3 that reacts with oxygen
to form an ionic compound
represented by X in the formula
X2O. [1]
| Answer--> Na
(needs to have a
charge of 1+, since O
is 2-)
|
|
