Answer:
What?
Explanation:
Which of the following are isotopes, choose all that apply.
Element X with atomic number 10 and atomic mass 21
Element Y with atomic number 11 and atomic mass 21
Element Z with atomic number 10 and atomic mass 22
Element M with atomic number 12 and atomic mass 21
Answer:
Element X with atomic number 10 and atomic mass 21
Element Z with atomic number 10 and atomic mass 22
Explanation:
Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of neutrons in their various nuclei.
Isotopes of an element have the same electronic configuration. They share the same chemical propertiesThey only differ in their masses.So, Element X and Z with atomic number 10 which is their number of electrons are isotopes. Their mass number, 21 and 22 differs.
What is the possible or stored energy in an object called?
Answer:
Potential energy is the energy stored within an object, due to the object's position, arrangement or state. Potential energy is one of the two main forms of energy, along with kinetic energy.
Explanation:
2. Petroleum is used to make
a. heating oil.
b. kerosene.
c. gasoline.
d. all of the above
Answer:
D. all of the above
Explanation:
Petroleum is used to make heating oil, kerosene, and gasoline. therefore all of the above is correct, Option D. This is further explained below.
What is Petroleum?Generally, Petroleum is simply defined as a liquid combination of hydrocarbons found in a geological layers and then extracted and purified to generate fuels such as petrol.
In conclusion, Petroleum is used to produce a number of products e.g a. heating oil, kerosene, and gasoline.
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