Answer:
electrons located outside the nucleus
Explanation:
electrons are said to be located outside the nucleus of an atom and are in orbit around the nucleus.
according to Bohr in 1913.
A medium can be anything that a wave can pass through e.g the medium can be solid objects, air, water, etc.
Answer: 1 proton, 0 electron and 1 neutron are present in 1 H⁺ isotope.
Density = mass/volume = 800/200 =4 g/cm^3
Answer:
c tarnishes in air
Explanation:
After silver has been exposed to air that contains sulphur gases, discoloration would occur. there would be darkening that is caused by the reaction with gases.When any silver object tarnishes, it brings about a disfiguring of that object. Hydrogen sulphide would be needed for this to happen. silver sulphide is black and a if a thin layer should form on any surface, it ill darken it. This is what we refer to as tarnishing.
