Answer:
a) 
b) 
c) 
Explanation:
The symbols of the isotopes are written like
where,
X is the element
A is the mass number (protons + neutrons)
Z is the atomic number (protons)
<em>a) Iodine-131</em>
The atomic number of iodine is 53. The mass number of this isotope is 131. The symbol is .
<em>b) Iridium-192</em>
The atomic number of iridium is 77. The mass number of this isotope is 192. The symbol is .
<em>c) Samarium-153</em>
The atomic number of samarium is 62. The mass number of this isotope is 153. The symbol is .
Answer:
a solution: for example when sugar is dissolved in water it becomes a sugar solution
I'd say no because the only pure substances are elements
Explanation:
Polymers are extensively used innovative materials, which are originated nearly in each material used in our daily life. Polymers, a big class of resources, comprise of many small particles called monomers that are related composed to form long shackles and are used in a lot of products and goods that we use in daily life. The polymer named Polyethylene is used in plastic bags and film wraps. Polyvinyl Chloride ( PVC) is castoff in siding, pipes, flooring determinations. The synthetic polymer Polystyrene is used in cabinets, petri dishes, CD cases, plastic cutlery and in packaging. Polyvinyl acetate is used in adhesives and latex paints.
