ESTION 5 (Start on a new page.) Define the term isotope
(2)
Study the unknown elements A to E below
A
18x
x
D
19
10
IX Х
С
20 x
Х
21
11
Х
E
"Х
5.2.1
Which of the elements above are isotopes of each other?
(1
(1
5.2.2 Write down the name of this isotope. (Allom the
Calculate the relative atomic mass of copper by using the following isotopes
of copper
Copper isotopes: 63 Cu - 69% and 65Cu - 31%
ah
below
Write only the answer next to the questio​

Drug abuse will not lead to physical and psychological dependence. true or false ?

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.