Answer:
Advantages :they are used for seeing chemical reactions .
they are used for doing chemical experiment .
they are used for making affective medicines .
Disadvantages :they harms to our environment.
they can make side effects in our body by affective medicines made by chemicals.
while doing different unknown experiments they make explosions which can also harm to us.
An element has no charge so its protons must be balanced with its electrons
so if X has 82 protons then it must have 82 electrons so that the atoms sum of charges adds up to 0
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Answer: A tick on a deer
Explanation:
because commensalism is a type of symbiotic relationship in which one species benefits, while the other species is neither harmed nor helped
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Answer:
Density
Explanation:
The mass of an element is the average weight that the isotope of the particular element contains. Its characteristic indicates the amount of substance present in an element.
However, the volume of an element on the other hand is the mole of an element that is contained in a room temperature.
The relation joining both the mass and volume of an element is density.
This is because density showcase the relationship between the mass of an element to space in occupies in terms of volume.
It is given by the formula:
Density = mass/volume
Answer:
The speed of the car is 75 km per hour
Explanation:
Speed is distance over time so 150 km divided by 2 hours is 75km per hour.
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