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Explore questions in the Uncategorized category that you can ask Spark.E!
- When all the positive and negative charges in an atom or molecule cancel out completely, the atom or molecule is ____________________.
- 2 ore more elements can be combined to create a
- when pure elements come together to form a new compound a change in energy called ____________________ occurs
- The relevant objects and effects involved in an investigation constitute (make up) the ________
- In a solution of water and sugar, water is considered the ____________________and sugar is considered the ____________________.
- in a chemical equation the numbers in front of the compounds are called
- Can the components of a heterogeneous mixture be separated easily?
- An element is a good ____________________if it easily allows heat to flow across.
- ____________________motion is the erratic and random movement of particles in water or air due to constant collision of molecules.
- A reaction that requires a large amount of ________energy is not likely to occur spontaneously.
- heat is ____________________ when ice is melted and ____________________when water is condensed
- according to the ____________________, heat cannot be transferred from lower temperature to higher temperature and the energy lost by a system must be gained by the surrounding or another system.
- the ____________________ forces that hold molecules together are stronger in a solid than a liquid
- Element that quickly and violently react when exposed to water are said to have a high level of ____________________.
- The forces that link a one atom to another atom in a molecule are called _____________forces.
- What type of mixture has components that are evenly distributed throughout?
- When a substance is dissolved in water it is said to be ____________________.
- In a ____________________change the structure or composition of molecules in a substance is disrupted in order to create a new substance.
- Why does the nucleus of an atom have a positive charge?
- Nearly all the volume of an atom is occupied by ____________________. Nearly all the mass of an atom is contained in the ____________________of the atom.