Answer:
By placing the steel wool in a jar with plenty of oxygen and water, you start a chemical reaction. The iron and the oxygen react to form a new reddish-brown substance, called iron oxide or rust. In this experiment, the water level in the glass should rise as the oxygen inside combines with the iron in the steel wool.
Explanation:
Answer:
The atomic radius gets smaller the farther right it appears on the
periodic table.
Explanation:
Number of protons is increasing across the period so electrostatic attraction between the positive nucleus and the valence electrons increases and electrons are drawn close to the positive nucleus. This increases nuclear charge and so atomic radii gets smaller.
Also, the atomic radii size also depend on Electron - electron repulsion and shielding of the outermost valence electrons by the inner-most energy levels for the positive nucleus and number of energy levels.
Across the period, the electron-electron repulsion does not increase but there is increasing nuclear charge. The valence electrons are added to same energy level so electron shielding of the positive nucleus by the inner electrons is the same across the period.
