Answer:
Sufficient concentration and correct orientation of particles
Explanation:
The collision theory postulates that, for a chemical reaction to occur, there must be collision between reacting particles.
It implies that the rate of reaction depends on the number of collisions per unit time as well as the fraction that are successful or effective.
For collisions to be effective, there must be proper orientation of the particles and right concentration of the reactants.
- The number of effective collisions and rate of reaction are directly proportional to the concentration of of the reactants.
In a nutshell, stars are mainly made of hygrogen, element 1.
over time, elements got more dense as they collided and cooled, leading to other gases, metals...
then they explode, which lead to all kinds of further complex elements.
The stuff that makes up the universe a lot of it is from exploding star stuff, and the Earth was built up upon these remains and the atoms that make up organisms even could originally be from stars.
<span> "B. Empty space around the nucleus"
because of this empty space, most radiated particles can pass </span>straight through, while the others get propelled in different directions.
Answer:
Sr(OH)2
Explanation:
Strontium hydroxide, Sr(OH)2, is a caustic alkali composed of one strontium ion and two hydroxide ions. ... Sr(OH)2 exists in anhydrous, monohydrate, or octahydrate form.
