Question

Please help me ASAP the question is done below

Answer 1

Answer:

Explanation:

First Question. Answer is: B. They are different.

For examle, balanced chemical reaction of forming water from hydrogen and oxygen:

2H₂ + O₂ → 2H₂O.

During chemical reaction no particles are created or destroyed, the atoms are simply rearranged from the reactants to the products.

Oxygen (element) has boiling point of -183°C and hydrogen has boiling point of -253°C. In this chemical change water (compound) is produced and it has new boiling point, boiling point of water is 100°C.

Answer 2

Answer: 1. B ( They are Different )

              2. C (It will give up its valence electron to the other atom.)

Explanation:

1.When elements are combined to form compounds, they undergo chemical change in which the properties of the composing elements are always different from the compounds formed after reaction. The change is not only applicable to the chemical properties of the elements but also the physical states of the substances.

2.As per the question the first atom has 1 valence electron.

The second atom has 7 valence electrons.

The two atoms come closer and combined to form a substance.

Atoms having one valence electrons will be considered as electropositive  and the atoms having seven valence electrons are considered as electronegative .

As per the octet role,every atom tends to possess eight electrons  in their valence shells to satisfy the inert gas configuration to be stable.

Here the atoms having one valence electrons will lose one atom and atoms having seven electrons will accept this electron .In this way both the atoms will satisfy inert gas configuration. The atom which will lose electrons tends to form cation and the atom which will accept electrons tends to form anion.So there is the chance of formation of ionic bond

The electronegative atom can not emit seven electrons as it will require more ionization energy.The atom having one atom in its valence shell can not accept one electron from the other atom as by doing so they will lose their stability.

There will be no sharing of electrons here.It is because the atoms having one atom in their valence shell has low ionization energy and atoms having seven electrons in their valence shells have high electron affinity.Here ionic bond is favorable not covalent bond.