Answer:
Numbers 4,3
Explanation:
Ionic bond is between nonmental and metals
Answer:- A) Exothermic, B) Reactant side(left side), C) Product side(right side), D) Reactant side(left side) and E) Le-chatelier's principle.
Explanations:- A) 
of the reaction is negative and it indicates an exothermic reaction.
B) Equilibrium shifts to the reactant side if nitrogen gas is removed. If anything is added then reaction moves in a direction where this added component is used and if something is removed then reaction moves in a direction where this removed component is formed.
C) Exothermic reactions are favored at low temperature and endothermic reactions are favored at high temperature. The temperature is lowered, so the reaction will shift to the product side.
D) The reaction shifts to the reactant side if ammonia is added so that it could be used to reestablish the equilibrium.
E) Le-chatelier's principle helps to answer B-D. As per this principle, reaction shifts in a direction where the stress is relieved. It means if anything is added then it must be used and if something is removed then it must be formed.
Answer:
The octet rule means that atoms need a total of 8 valence electrons to fill their valence shell. Hydrogen only needs two to fill its valence shell.
Explanation:
All atoms except for hydrogen can hold a total of 8 valence electrons in their outer energy levels (2 in the s level, 6 in the p level). Hydrogen only has two electrons total, so it does not require more than the s level and two electrons to have a full valence.
Answer:
Detail is given below.
Explanation:
Electron:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol= e-
Mass= 9.10938356×10-31 Kg
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
Neutron and proton:
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P+
Symbol of neutron= n0
Mass of proton=1.672623×10-27 Kg
Mass of neutron=1.674929×10-27 Kg
Location of electron, proton and neutron.
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom of nitrogen have 7 protons than it must have 7 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
For example
Mass of nitrogen = number of neutron + number of proton
Mass of nitrogen = 7 + 7 = 14
Atomic number of nitrogen = number of electron or number of proton
Atomic number of nitrogen = 7
Answer:
Hybridization is the concept of mixing atomic orbitals to form new hybrid orbitals (with different energies, shapes, etc., than the component atomic orbitals) suitable for the pairing of electrons to form chemical bonds in valence bond theory.
