D. Give one word for the following:
1. the smallest particle of matter
2. the force of attraction between the molecules of same substance
3.
a group of atoms
4.
the space between molecules
5. the motion of molecules
Answers
Answer:
atom
cohesion
molecules
vibration / to and fro
Answer:
Today, we know that atoms do not represent the smallest unit of matter. Particles called quarks and leptons seem to be the fundamental building blocks - but perhaps there is something even smaller. Physicists are still far from understanding why a proton has about 2,000 times more mass than an electron.
The force of cohesion is defined as the force of attraction between molecules of the same substance. The force of adhesion is defined as the force of attraction between different substances, such as glass and water.
When atoms join together, the group is called a molecule. The atoms in a molecule can the the same.
As atoms are the smallest stable pieces of matter, and as molecules are composed of atoms, it follows that the space between molecules contains nothing; it is vacuum.
Molecular motion is defined as the movement of constituent particles or molecules in a certain direction. The molecular motions are affected by heat and temperature. This is because the temperature is the measurement of the average kinetic energy of the molecules and represents the motion of molecules.