its 640 because 150 goes into 900 6.4 times do you multiply 6.4 and 100 which is 640.
Three states of matter
Solids, liquids and gases are three states of matter. In solids, the particles are tightly packed together. In liquids, the particles have more movement, while in gases, they are spread out. Particles in chemistry can be atoms, ions or molecules.
It is important to understand the particle nature of matter. The particles that make up matter are not ‘small bits of solid’ or ‘small drops of liquid’ but atoms and molecules. The physical characteristics of those atoms and molecules decide its state.
Smooth, rough, hard or soft are common descriptions
C) Stars get born, get older, then eventually die.
Independent atoms have high potential energy,and they are highly unstable.
And when they form bonds their potential energy decreases and they become stable.
Hence bonded atoms are stable and have relatively low potential energy than independent atoms.
