Summarize the physical and chemical properties of the element you selected. in the lesson, many models were used to depict the atom. how did these models you understand atomic structure? how do protons, neutrons, and electrons differ in terms of their electrical charges and locations within the atom? describe the four fundamental forces. which of these forces are involved in chemical bonding?

Explanation:

Summarize the physical and chemical properties of the element you selected. In the lesson, many models were used to depict the atom:

Physical properties of an element or substance describes everything about it when no change is occuring to its constituents. We observe such features with our sense, instruments or certain apparatus. Examples arre colour, odour, state of matter, texture, hardness.

Chemical properties are properties which originates from the reaction of a substance with another. Examples are flammability, rusting of iron, precipitation etc.

In the lesson, many models were used to depict the atom. How did these models help you understand atomic structure?

The different models of the atom helps to have a proper view about the smallest substance known. From the simple atomic model proposed by the Greek, to the works of John Dalton, through the plum pudding model and the Bohr's model of the atom, one can only better percieve the make up of an atom and how to properly understand the nature of interactions they can be involved in.

How do protons, neutrons, and electrons differ in terms of their electrical charges and locations within the atom?

In terms of electrical charges, protons are positively charged subatomic particles. Electrons are negatively charged particles in an atom. Neutrons carry no charges.

Atoms have a dense and small nucleus which consists of protons and neutrons in their central region. The electrons orbits the nucleus round about. Electrons occupy more space than protons and neutrons.

Describe the four fundamental forces.

The four fundamental forces are:

Strong nuclear forces are by far the strongest of all forces and they are responsible for holding the nucleons together in an atom.

Weak nuclear forces are those expressed during the radioactive decay of an atom.

Electromagnetic forces results from electrostatic forces between bodies. They result from electric charges between bodies.

Gravitational forces are forces of attraction between bodies in the universe. They are weak forces.

Which of these forces are involved in chemical bonding?

The electromagnetic forces causes chemical bonding. The loss and gain of electrons between atoms causes the attraction for the bonds to occur.

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Explanation:

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.