Question

3. Imagine that a new element called 'davidium' had
been isolated. It has a low density, and is a solid
al formulae shown
which is soft and can be easily cut with a knife. It
is extremely reactive with both air and water. It is
a good conductor of heat and electricity and also
has a low melting point.
(a) Which group of the Periodic Table would you
place davidium in? Group
1
(b) How many electrons would it have in the
outermost shell of its atom?
(c) How would you store it?
(d) Given its symbol is Da, what do you think
would be the symbol for its ion?
(e) Write the chemical formulae for its sulphate,
nitrate, carbonate, chloride and hydroxide.
(f) Write a balanced chemical equation for its
reaction with oxygen (air).
(g) Write a balanced chemical equation for its
reaction with water.
(h) Name three other elements which have
properties similar to davidium​

Answer 1

Explanation:

The properties you are explaining for the new element match with group 1 elements .Because the elements in group 1 also very reactive toward air and moisture.

Since we place it in group 1 ,it have only one electron in its valance electron.

We will store it in some non polar hydrocarbon liquid like parafin or karosin or some liquid wax

Symbol for its ion be like Da+

It's sulphate ,nitrate,carbonate,chloride and hydroxide compounds will have a farmula like Da2SO4 , DaNO3, Da2CO3, DaCl and DaOH respectively

reaction with oxygen will have a chemical reaction like

Da + KE ----------> Da2O

reaction with water

Da + H20 ---------> DaOH

elements having properties same like davadium are lithium sodium and potassium