The substances that are formed by a chemical change are called the product.
While the state of matter in which a material has a definite volume and a definite shape is the solid.
In a chemical reaction, the reactant on the left hand side undergoes a chemical change and gives product.
While in a solid state, a material has a definite volume and a definite shape is the solid.
Answer:
Electron affinity increases when moving left to right of the period.
Explanation:
Electron affinity is the amount of energy released when an isolated gaseous atom accepts electron to form the corresponding anion.
Trend of electron affinity across the period:-
- Across the period, the electron affinity increases as there is an increase in effective nuclear charge.
- Due to this, there is more force of attraction between the nucleus and the valence electrons when moving left to right in a period.
- Thus, more amount of energy is released when an electron is being gained in the neutral atom to form anion.
- Thus, electron affinity increases when moving left to right of the period.
Thus,
Al : -44 kJ/mol
Si : -120 kJ/mol
P : -74 kJ/mol
S : -200.4 kJ/mol
Cl : -384.7 kJ/mol
Al, Si, P, S, Cl are the members of third period and thus, left to right, the electron affinities of the elements increases as can be seen from the literature values.
Maybe formulate a hypothesis....
Do you mean like what is the core for investigation?
Variable are factors that influence our observation for investigation.
