Atoms are electrically neutral because they contain equal quantities of positively charged protons and negatively charged electrons. Electrons and protons have equal but opposite charges, so the result is no net charge. Ions are atoms that have gained or lost electrons.
Oxygen almost always has an oxidation number of -2
The only exception is in H2O2 which makes it -1, and in OF2 which makes it +2
Answer:
distance decreases and force increases
Explanation:
- Simple machine means less power
- Hence it will require more force.
- Hence distance will decrease with respect to force and force will decrease
Answer:
c. isotope number
Explanation:
Mass Number is the sum total of mass of protons and neutrons present in the nucleus of an atom. Generally they are being used in distinguishing isotopes. E.g Carbon - 12, Carbon - 13
Atomic Number is the number of protons. Every single element has it's unique atomic number and can be used in identification purpose. E.g Carbon - 6, Hydrogen - 1.
The correct option is option C. This is the symbol that is not necessary for the identification of a nuclide.
