Hi there!
The oxygen we breathe is classified as Chalcogen and Nonmetal.
It is a gas.
And, the atomic weight is 15.9994
Hope this helps you!
~DL ☆☆☆
Answer:
Kinetic energy is the energy that an object has because of its motion. The molecules in a substance have a range of kinetic energies because they don't all move at the same speed. As a substance absorbs heat the particles move faster so the average kinetic energy and therefore the temperature increases.
Answer: The athlete will have same mechanical energy at the bottom of the hill.
Explanation:
Mechanical energy is defined as the sum of the potential energy and kinetic energy that is used to do work. Mechanical energy of an object cannot be created nor be destroyed. It can be transformed from one form to another.
M.E= P.E+K.E
The mechanical of the energy of an athlete on skate board on the top of the hill was 'X' joules.
When she reached the bottom of the hill, the mechanical energy of her remained constant. During this process the potential energy from the initial point got transformed into the kinetic energy at final point by which the mechanical energy remained constant.
Answer: Mendeleev's periodic law : The properties of element are a periodic function of the atomic masses . Limitations:-(1)positions of hydrogen is not correctly placed. (2) The positions of isotopes could not be explained . For ex:- cl35 are cl37 are placed in the same group.
Explanation:
Woah, that doesn't look like high school. That's gotta be college level.