Solid bodies - molecules are stationary, form a crystal lattice, constant shape and volume. Liquids are a constant volume, take the form of a vessel in which they are located (molecules flow into the voids formed). Gases do not have a constant shape or volume (they take the shape and volume of the vessel in which they are located), the molecules actively interact with each other.
Why? Think about it - solids hold better than any of those two - And gasses hold the weakest and liquid goes in the middle :)
Question 3 is liquid, because if you put like, we'll say water, if you put water into a round bottle it would look round, right? It would go for any other shaped bottle - It would look like that same shape. But you can't change the volume - It will always be the same
Question 7 is FALSE - They're actually exothermic reactions. :)
Last question 8 - They are moving very fast and are far apart -
Note that the closer together molecules are together, the harder something is :D
Why? Think about it - solids hold better than any of those two - And gasses hold the weakest and liquid goes in the middle :)
Question 3 is liquid, because if you put like, we'll say water, if you put water into a round bottle it would look round, right? It would go for any other shaped bottle - It would look like that same shape. But you can't change the volume - It will always be the same
Question 7 is FALSE - They're actually exothermic reactions. :)
Last question 8 - They are moving very fast and are far apart -
Note that the closer together molecules are together, the harder something is :D
Since the particles composing a solid are arranged in such a way that they conform a rigid and organized structure, the cohesive forces are stronger in order for them to be correctly ordered and assembled. Unlike the solids, both liquid and gases have molecules in constant motion, considering that the gaseous molecules move freely along the containers.
Since the particles composing a solid are arranged in such a way that they conform a rigid and organized structure, the cohesive forces are stronger in order for them to be correctly ordered and assembled. Unlike the solids, both liquid and gases have molecules in constant motion, considering that the gaseous molecules move freely along the containers.
Answer: chalcogens.
Explanation: Strontium is an alkaline earth metal, it always exhibits a degree of oxidation in its compounds +2.
Chalcogens are a group of 6 chemical elements (oxygen O, sulfur S, selenium se, tellurium te, polonium Po) that have an oxidation state of -2 => Chalcogens will combine with strontium in a ratio of 1:1.
Answer: b. Fiona is correct because the diagram shows two individual simple machines.
Explanation:
A mechanical device using which we can change the direction or magnitude of force applied is known as simple machine.
For example, in the given diagram there are two individual simple machines.
The machine helps in changing the direction or magnitude of force applied by the man. As a result, it becomes easy for him to carry different things easily from one place to another.
Thus, we can conclude that the statement Fiona is correct because the diagram shows two individual simple machines, is correct.
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