Question 1. Every pure substance, regardless of the method of making it and being in nature, has a constant qualitative and quantitative composition.
1) The law of simple volume ratio.
2) The law of Avogadro.
3) The law of definite proportions.
4) The law of simple multiple proportions.
5) The law of equivalents.
Question 2.Edinitsa amount of substance -
Question 3. The valence electrons of an atom layer of gallium - Ga:
3) 4s2p '
Question 4. The quantum numbers describing a) orbital shape, b) the direction of the electron clouds in space:
1) a) l, b) / m I
2) a) n, b) l
3) a) m I, b) t S
4) a) n, b) m I
5) a) m I, b) l
QUANTUM NUMBERS - describe the state of a particular electron in the electron cloud of the atom:
- MAIN (n) - shows on which electronic level, starting from the closest to the core (1, 2, 3, ...) is the electron;
- Auxiliary or orbital (l) - shows a sublayer (s-sublevel, p-sublayer, d-sublevel, f-sublayer);
- Magnetic (m) - indicates a specific orbital (s-orbital, px-orbital, py-orbital, etc.);
- SPIN (s) - shows which of the two possible (allowed) takes the electron states at a given orbital.
Question 5: In the molecule of a substance from the central atom holds sp2 - hybridization?
Circle one s and two p orbitals involved in the formation of molecules BCl3.
Question 6. Links are located in the order of increasing strength:
1) H-Cl, HF, H-Br
2) HF, H-C1, H-Br
3) H-Br, HF, H-C1
4) H-Br, H-Cl, HF
5) H-Cl, H-Br, HF.
Question 7: At absolute zero, the entropy of all bodies is 0.
2) Periodic Law
3) The first law of thermodynamics law
4) The second law of thermodynamics
5) The third law of thermodynamics.
The value of an additive constant that arises in the determination of entropy set Nernst theorem, which is often called the third law of thermodynamics: entropy of any system in the absolute,