Chemistry
He is considered the father of chemistry
Antoine Lavoisier
Evaporization
What is the meaning of the word Atom
No division
How many quantum numbers does the equation from Schrondinger have?
Four
How many elements does the Periodic Table have?
118
Chemistry is responsible for the study of this...
Matter
when you have an upset stomach, the ideal is to take an Alka seltzer, whose ingredients are: citric acid anhydride and sodium bicarbonate, which when coming into contact with water, produce an effervescence. The above is classified as a change:
Chemical change
Jump that an electron gives from a lower energy lever to a higher one, absorbing a certain amount of energy
Quatum jump
What are the values that the fourth quantum number can take?
+1/2, -1/2
Look for the element which atomic mass (A) is 244 and has 150 neutrons.
Plutonium (Z=94)
DNA is a nucleic acid, which is found in the nucleus of the cell, and is responsible for transmitting genetic information. It is composed of nitrogen bases, sugar and a phosphate group. Mention the branch that would study this
Biochemistry
How can you distinguish between a mixture and a pure substance?
You can separate a mixture using physical methods.
In the Bohr model of hydrogen, the lowest amount of energy hydrogen’s one electron can have corresponds to being in the n = 1 orbit. This is called...
Ground state
What is the use of quantum numbers?
Numbers that describe the energies of electrons in atoms, the area where an electron might be found.
Which one is bigger Ca or Ca2+? Explain your answer
Ca, because the ion has lost electrons, therefore it has more protons than electron and as a consequence he will attract the remain electrons.
This happens, when the matter goes to the plasma state.
If you have a mixture of ketone and water (b.p. 58 C and 100 C corresponding), what would be the best method to separate this, if you want both substances?
Destillation
Took the Bohr atom model one step further and used mathematical equations to describe the likelihood of finding an electron in a certain position. This atomic model is known as the quantum mechanical model of the atom.
Schrödinger
Angular Momentum Quantum Number can take 4 different values, mention all of them and their meaning.
s → sharp
p → principal
d → diffuse
f → fundamental
Elements which electronic configuration ends s1 and its highest energy level is 5.
Rubidium (Z=37)
This is the temperature that corresponds to the absolute zero.
-273.15 Celsius
The melting point for Nitrogen (H2) is -210 Celsius. If you have a volume of 1 m3 at room temperature, and this is cold to a temperature of 0 Celsius, the name of the phase change is
There is none
It is the frequency spectrum of electromagnetic radiation emitted due to an atom or molecule that makes a transition from a state of high energy to a state of lower energy.
Emision spectrum
For Chlorine, its electronic configuration ends in 3s23p5, could you explain the meaning of these numbers?
3 highest energy level
s2 this subshell is full
p5 subshell is divided by 3px2, 3py2 and 3pz1 (incomplete)
Mention at least 5 periodic characteristics on which the periodic table is based and arranged.
Electronegativity
Ionization energy
Atomic number
Energy level
Electronic configuration