Answer:
Radioactive isotopes are widely used in medical field
Explanation:
Radioactive isotopes are widely used in medical field.
Radiations emitted by radioactive isotopes or used to kill the microorganism in food and to increase the shelf life of food.
Cobalt-60 is used to treat the cancer.
Iodine-131 is used to check the activity of thyroid.
Technetium-99 also used for the thyroid.
Phosphorus-32 is used to detect the cancer specially in skin and eyes.
Xenon-133 is used for lungs imaging.
Au-198 is used to diagnose the liver disease.
Co-60 is used as gamma ray irradiation of tumor.
In industry radioactive isotopes are used to measure the thickness of materials.
Answer: 177g
Explanation:
Aw 12 = 6.02214076*10^23 atoms
mass = 12*88.70^23/6.022*10^23
Answer:
See explanation
Explanation:
Molar mass is obtained as the sum of relative atomic masses as follow;
For CaBr = 40.08 + 79.90 = 119.98 g/mol
For BeBr = 9.012 + 79.90 = 88.912 g/mol
For CdBr2 = 112.41 + 2(79.90) = 272.21 g/mol
For CuBr2 = 63.55 + 2(79.90) = 223.35 g/mol
Answer: 
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here iron is having an oxidation state of +3 called as 
cation and oxide 
is an anion with oxidation state of -2. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral 
.
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
Answer:
Mixtures
Explanation:
Matter can be classified as a compound and a mixture.
