First Regent Review Flashcards
(15 cards)
At STP, what properties can be used to differentiate between two different samples of the same phase and mass?
- reaction with something
- density
- solubility in water
What type of bond is present in a sample of metal at STP?
Metallic bond
How can you determine a nonpolar molecule?
- All bonds are nonpolar and there are not valence electrons in the middle
- The electronegativity difference is < 0.4
- All bonds are polar but the outer atoms are the same and there are no valence electrons in the middle
How can you determine if something is covalent?
- Sharing electrons
- Only non-metals
How can you determine if something is ionic?
- Metal and nonmetal
- High electronegativity difference
What is Mr. Ba?
Making bonds leads to releasing energy
Breaking bonds leads to absorbing energy
In which phase can the proportion of some component be varied?
Aqueous
The particles of an ideal gas have…
random, constant, straight-line motion
A chemical reaction is most likely to occur when there is proper ___ and proper ___.
orientation; energy
When two gases have the same P, V, and T, they have the same amount of ____.
Moles
What affects the rate of a chemical reaction?
- Surface area
- Pressure for gasses
- Temperature
- Concentration
- Catalysts
What is used to find the net amount of energy released or absorbed during a chemical reaction?
potential energy of the products minus the potential energy of the reactants
Systems in nature tend to undergo changes towards _____ and ____.
lower energy; more disorder
What is used to describe the large amount of heat produced during a fission reaction?
Mass is converted to energy.
When going down in a column on the period table, what happens to the electronegativity and atomic radius?
The electronegativity increases
The atomic radius decreases
