![]() |
Created by Chuleeporn Thanomsilp
over 10 years ago
|
|
Question | Answer |
Define : The law of constant composition | for a given compound, the relative number and type of atoms are constant |
Define: The law of conservation of mass | Mass is neither created nor destroyed in chemical reactions. The total mass of materials present after a chemical reaction is the same as the total mass before the reaction. |
Define: the law of multiple proportions | two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the second element are in the ratio of small whole numbers |
Image:
dalton_s_model (image/jpg)
|
Dalton |
Who is named for the discovery of electron? | J.J.Thomson |
Image:
thomson (image/jpg)
|
J.J.Thomson |
What is the result from the MILLIKAN’S OIL-DROP EXPERIMENT? | Charge of electron (-1.602 x 10^-19 Coulomb) |
Who suggested the NUCLEAR MODEL OF THE ATOM ? | Ernest Rutherford from the effect of bombarding thin gold foil with alpha radiation |
the three most important subatomic particles | proton, neutron, electron |
Image:
nucleus_symbol (image/jpg)
|
A IS MASS NUMBER, Z IS ATOMIC NUMBER AND X IS ATOMIC SYMBOL OR ELEMENT SYMBOL. |
What is the nucleus symbol? proton = 47 neutron = 60 electron = 46 |
Image:
nucleus_symbol_2 (image/jpg)
|
Image:
nucleus_symbol_3 (image/jpg)
|
20 protons, 20 neutrons and 18 electrons |
What is isotope? | The elements with the same atomic number but different mass numbers. |
Light or energy consists of particles which are called _________. | photons |
What is the frequency of light with wavelength of 455 nm? | 6.59 × 10^14 s-1 |
A particular orbital is designated by which quantum numbers ? | n, l and ml |
Is this set of quantum numbers possible? n = 2, l = 2, ml = –2 | not possible, l must be less than n. |
Is this set of quantum numbers possible? n = 4, l = 2, ml = –2 | yes, l can be 0,1,2,3 for l =2 ml can be -2,-1,0,1,2 |
Image:
bohr (image/jpg)
|
Niels Bohr |
Atomic orbital | A specific set of quantum numbers. The area where it is high possibility to find electrons. |
What is the possible values of the spin quantum number (ms)? | The possible values are +½ and – ½. |
Image:
p_orbitals (image/jpg)
|
p orbitals |
What is the shape of s orbitals? | sphere |
How many d orbitals in d subshell? | 5 orbitals |
Which quantum number identify the orientation of atomic orbital? | the magnetic quantum number (ml) |
Which quantum number identify the energy of the orbital? | the principal quantum number (n) |
Which quantum number identify the shape of atomic orbital? | the orbital angular momentum quantum number ( l ) |
What is the possible values of the n quantum number? | positive integer number (n = 1,2,3,...) |
Image:
d_orbitals (image/jpg)
|
d orbitals |
What is cation? | Positively charged ion occurs when an atom loses electron (s). It has more protons than electrons. |
What is anion? | Negatively charged ion occurs when an atom gains electron(s). It has fewer protons than electrons. |
Want to create your own Flashcards for free with GoConqr? Learn more.