Answer:
A. 1 = 3 - 2
Explanation:
What defines an expression?
expression - An expression is a sentence with a minimum of two numbers and at least one math operation. This math operation can be addition, subtraction, multiplication, and division.
So if we look at the letter options we can see that A is the best choice.
Answer:
The amount of motion of these particles depends on the kinetic energy they possess. Particles with more kinetic energy move faster and farther apart. Particles with less energy move more slowly and stay closer together. The total kinetic energy of all the particles in a sample of matter is called thermal energy. Solids have the lowest kinetic energy as they are tightly packed and vibrate in place. Liquids have comparatively higher kinetic energy so the particles slide past each other. Gases have the most kinetic energy as a result they float around in the air.
Liquids have more kinetic energy than solids. When a substance increases in temperature, heat is being added, and its particles are gaining kinetic energy. Because of their close proximity to one another, liquid and solid particles experience inter-molecular forces.
Answer:
Elastic collisions between gas particles: Ideal gases are assumed to interact via perfectly elastic collisions in which no energy is lost. Intermolecular forces describe the attraction and repulsion between particles. They include: Instantaneous dipole-induced dipole forces or London dispersion forces.
Explanation:
scandium is a transition metal and shows a valency of 3.
