Question: What factors contribute to an increase in metallic character in an element?
About the article "Periodic table", section "Metallic character".

Candidate passages:
The cations associate with the anions in the solution.
These cations are reduced at the cathode to deposit in the metallic, zero valence state.
For example, in an acid solution, copper is oxidized at the anode to Cu2+ by losing two electrons.
The Cu2+ associates with the anion SO42- in the solution to form copper sulfate.
At the cathode, the Cu2+ is reduced to metallic copper by gaining two electrons.
The result is the effective transfer of copper from the anode source to a plate covering the cathode.
The plating is most commonly a single metallic element, not an alloy.
However, some alloys can be electrodeposited, notably brass and solder.
Many plating baths include cyanides of other metals (e.g., potassium cyanide) in addition to cyanides of the metal to be deposited.
These free cyanides facilitate anode corrosion, help to maintain a constant metal ion level and contribute to conductivity.
Additionally, non-metal chemicals such as carbonates and phosphates may be added to increase conductivity.
When plating is not desired on certain areas of the substrate, stop-offs are applied to prevent the bath from coming in contact with the substrate.
Typical stop-offs include tape, foil, lacquers, and waxes. 
The reactivities of the alkali metals increase going down the group.
This is the result of a combination of two factors: the first ionisation energies and atomisation energies of the alkali metals.
Because the first ionisation energy of the alkali metals decreases down the group, it is easier for the outermost electron to be removed from the atom and participate in chemical reactions, thus increasing reactivity down the group.
The atomisation energy measures the strength of the metallic bond of an element, which falls down the group as the atoms increase in radius and thus the metallic bond must increase in length, making the delocalised electrons further away from the attraction of the nuclei of the heavier alkali metals.
Adding the atomisation and first ionisation energies gives a quantity closely related to (but not equal to) the activation energy of the reaction of an alkali metal with another substance.
This quantity decreases going down the group, and so does the activation energy; thus, chemical reactions can occur faster and the reactivity increases down the group. 
In patients with ischemic heart disease there is an accumulation of angiogenic growth factors in the pericardial fluid.
These contribute to angiogenesis (the formation of new blood vessels) and arteriogenesis (the increase in diameter of existing arterioles).
This helps to prevent myocardial ischemia (lack of oxygen to the heart). 
The lower the values of ionization energy, electronegativity and electron affinity, the more metallic character the element has.
Conversely, nonmetallic character increases with higher values of these properties.
Given the periodic trends of these three properties, metallic character tends to decrease going across a period (or row) and, with some irregularities (mostly) due to poor screening of the nucleus by d and f electrons, and relativistic effects, tends to increase going down a group (or column or family).
Thus, the most metallic elements (such as caesium and francium) are found at the bottom left of traditional periodic tables and the most nonmetallic elements (oxygen, fluorine, chlorine) at the top right.
The combination of horizontal and vertical trends in metallic character explains the stair-shaped dividing line between metals and nonmetals found on some periodic tables, and the practice of sometimes categorizing several elements adjacent to that line, or elements adjacent to those elements, as metalloids.
Muscle hypertrophy involves an increase in size of skeletal muscle through an increase in the size of its component cells.
Two factors contribute to hypertrophy: sarcoplasmic hypertrophy, which focuses more on increased muscle glycogen storage and myofibrillar hypertrophy which focuses more on increased myofibril size.
However, neither happens in isolation, which is why top-level bodybuilders and strongman competitors have different but comparable muscle size and strength.