Answer:
The correct answer is : When they need to acquire information regarding the patient's contact with infectious agents.
Explanation:
A material safety data sheet or commonly known as MSDS book is a document that contain and list the hazardous effect, ingredients of a particular substance with physical and chemical characteristics. This list or book also gives idea about the effect of such hazard on human health.
A healthcare provider need to refer this book to know about the chemicals or substances that come in contact of a patient to get information about how it can adversely react, what are the handling precautions, the types of measures that can be used in case of exposure, or emergency.
Thus, the correct answer is : When they need to acquire information regarding the patient's contact with infectious agents.
Answer:
Toxocara canis
Explanation:
Predator prey route is the transmission method used by different protozoa. They enter the body of the prey when they eat an infected prey. They are infused in the blood of the predator and then resides there forming an infection. They overcome transmission barriers and enters the body of host.
Answer:
Explanation:
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Answer: B) The number of electron in its valence shell.
Explanation:
Outermost electrons of the atoms which can participate in the chemical bond formation is known as valence electrons.
Atoms either transfer or share its valence electrons during chemical bond formation. Atoms transfer or share electrons to attain octet or in other words stability.
Generally, 8 electrons are required in their outermost shell or valence shell in order to attain stability. This rule is known as octet rule.
For example, general electronic configuration of sodium belonging to group 1 is 1s2 2s2 2p6 3s1.
No. of valence electrons in Na = 1
by loosing 1 electron, its outer shell electronic configuration become = 1s2 2s2 2p6 (Octet)
Hence, sodium and other group 1 elements are very reactive.
Similarly, halogens (ns2 np5) by gaining 1 electron attain octet (ns2 np6). Hence halogens are also very reactive.
Carbon atom belonging to group 14 has 4 valence electrons (ns2 np2) and share all 4 valence electrons to attain octet and hence reactive.
Nobel gases have octet in their outermost shell (ns2 np6), hence they are most nonreactive element.
