The least reactive elements are the noble gases since they have a full valence shell and thus require a lot of energy in order to form bonds.
For metals, reactivity increases as you move down a group and as you move leftward within a period.
The trend within a period is due to the increase in ionization energy caused by the decrease in electrons needed to be lost in order for an element achieve a full valence electron shell. The trend within a group is due to the valence shell being further away from the nucleus, resulting in less attractive forces and thus less energy needed for reaction.
For nonmetals, the trends are reversed. Reactivity as you move up a group and as you move rightward within a period.
As you move up a group, the element increases in electromagnetism and thus increasing its reactivity. As you move across a period, there is less electrons needed to be received in order for the element to achieve a full valence shell
hope this helps hun
Answer: Fats
Explanation:
The food energy can be defined as the chemical energy that animals or humans receive from the food they eat via cellular respiration. The food energy is in the form of biological fuel which are necessary for metabolic processes in the body like respiration, cell growth and repair, reproduction, digestion and other functions.
The food consists of biomolecules like proteins, carbohydrates, fats and others which act as biological fuels.
The fat is a biological fuel which contains the highest amount of food energy per gram. The fat contains 37kcal/g energy. Proteins and carbohydrates only provide 17kcal/g energy.
The fats are stored in the adipocytes of the humans and animals and are the energy reservoirs.
1:3 hope DAT helps #ZedTheZom
*Warning* This is an educated guess
I would go with point B because it is at the lowest point on the map. Water always travels down, meaning, if no obstructions, it would travel to the ground closest to the Earth's center.
Hope this helps!
The answer is 3). This is because elements are the simplest form of a substance, and cannot be broken down any further. Compounds on the other hand are much more complex than elements and can be broken down INTO elements.
For example, Na, sodium, is an element and cannot be broken down further. H2O, water, is a compound and can be broken down into Hydrogen and Oxygen.
