Answer:
The correct answer is - C: Energy is neither created nor destroyed, but continually transformed into new forms of energy.
Explanation:
Conservation of energy is the first law of thermodynamics that says that energy is neither generated nor destroyed, can only be transformed from one form to another form continuously. That means no matter what the condition the amount of energy will remain the same, only form will be changed.
For instance, if an electric current will pass through a circuit of a light bulb the electrical energy present in the circuit will transfer into heat and light energy, The amount will remain constant but the one form change to another.
First, let's find the number of neutrons in Calcium-40. to find the number of neutrons, you need to take the atomic mass minus atomic number
neutrons in Calcium---> 40 - 20 (atomic number) = 20 neutrons
potassium-40---> 40- 19= 21
scandium-44----> 44- 21= 23
argon-38---------> 38- 18= 20
chlorine-36------> 36- 17= 19
the answer is argon-38
Molar mass = 133.34 g/mol
Answer:
Alloy
Explanation:
Alloy: An alloy is a substance prepared by adding one or more element to a base or parent metal to obtain desirable products. The added element are usually metals or carbon. An alloy can be considered as a uniform mixture.
Examples of Alloy:
⇒ Brass is an alloy that contains 60 - 80% of copper and 20- 40% of zinc.
⇒Bronze is an alloy that contains 90% of copper and 10% of tin.
⇒ Steel is an alloy that contains 99.8% of iron and 0.2% of carbon.
Uses of Alloys:
⇒ They are used for making coins and medals
⇒ They are used in the construction of aircraft, ships and cars.
⇒They are used for making electromagnet.
