Answer: -
Oxygen, a group 16 element with an electron configuration of 1s22s22p4, will form a __Negative___ ion in a chemical bond
Explanation: -
Oxygen has the electronic configuration of 1s2 2s2 2p4.
Number if valence electrons of oxygen = 2 + 4 = 6
Oxygen just needs 2 more electrons to have 8 electrons in it's valence shell and become stable as per Octet rule.
Thus oxygen will accept 2 electrons during formation of a chemical bond.
Due to this it will have negative charge and form a negative ion or anion in a chemical bond.
The atomic structure of an atom is well explained experimentally by different experiments like Rutherford's experiment etc
Based on these experiments it was determined that the atoms contains a central part known as nucleus which contains the positively charged sub atomic particles protons and neutral sub atomic particles neutron.
There is empty space around the nucleus in which negatively charged subatomic particles are found known as electrons.
So answers are
a) protons
b) neutrons
c) electrons
Answer:
C2H5OH(l) + O2(g) → CO2(g) + ?H2O(l)
The coefficient should be 3
Explanation:
C2H5OH(l) + O2(g) → CO2(g) + ?H2O(l)
The chemical equation is a reaction between ethanol and oxygen . The reaction yield is carbon dioxide and water. Balancing the chemical equation requires one to make the number of atoms on the reactant side be equal to the number of atoms on the product side.
C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)
The hydrogen atom on the left hand side of the equation is 6. Therefore, the number of atom of hydrogen should be 6 on the right hand side. The number of oxygen atom on the left hand side is 7. Therefore, the number of Oxygen atom on the right hand side should 7 . Oxygen atom in carbon dioxide(right hand side) is 4 atoms, therefore, it requires 3 atoms of oxygen to make the oxygen atoms 7.
Using 3 as the coefficient of water in the equation will make hydrogen 6 and oxygen 3 .Adding the 3 oxygen to the already 4 atoms of oxygen in carbon dioxide will make oxygen 7 atoms
Answer : The missing part is,
Explanation :
Nuclear fission : It is a process in which a heavy nuclei absorbs a neutron, they split or fission into two small nuclei and 3 neutrons.
Atomic number of Cf = 98
Atomic mass of Cf = 252
Atomic number of Te = 52
Atomic mass of Cf = 136
Atomic number of unknown element = [(252 + 1) - (136 + 3)] = 114
Atomic mass of unknown element = 98 - 52 = 46
So, the unknown element is, palladium (Pd)
The complete nuclear fission of a californium atom will be,
Hence, the missing part is,