Answer is "A".
Explanation;
Physical changes mean an arrangement of particles of a given substance without producing new substance but changes in physical form of the substance.
<em>Example :</em> vaporization of water ( water goes its gaseous phase from liquid form).
Chemical changes mean an arrangement of particles while forming new substance.
<em>Example : </em>heating of CaCO₃. (In this process CaO and CO₂ are formed).
In this problem, the volume of water has decreased. Hence, it can be said that this is an example of physical changes due to not forming of new substance.
Answer:
different between Hologens and 0element
Explanation:
The reactivity of the elements decreases as you decent the group. This can be seen if we observe the reaction between halogens. Elements in the same group in this periodic table have similar chemical properties. Group 0 elements are unreactive nonmetal called the noble gases.
Answer:
The time is likely between 40-80 seconds.
Explanation:
youre welcome
Answer:
False
Explanation:
There is a direct relationship between wave frequency and energy...
The higher the frequency, the higher the energy
alternatively, the lower the frequency, the lower the energy
Answer:
The small bodies from which the planets formed are called planetesimals.