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3 years ago

How can you change the amount chemical potential energy in a bond?

1 answer:

8 0

<span>Every atom and molecule has its own chemical potential energy value since atoms and molecules are attracted to each other. Whenever atoms and molecules form ionic or covalent bonds, their individual potential energies are converted into heat or light energy. The heat or light energy is released as the bonds form. Atoms that form strong bonds have lower potential chemical energy levels and release little heat or light, while atoms that form weak bonds have higher potential chemical energy levels and release a lot of heat or light during the formation of chemical bonds.
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Storm surge, high wind, heavy rains which is most dangerous

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The answer is storm surge

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Which factors were affected by the breakup of the supercontinent Pangaea? Check all that apply.

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Answer:

Global wind patterns

Ocean currents

Global climates

Explanation:

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How many orbitals in an atom can have each of the following designations:

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Answer:

(a) 1s; has one orbital

(b) 4d; has five orbitals

(c) 3p; has three orbitals

(d) n=3 has nine orbitals

Explanation:

Electrons in an atom are always in constant motion, making it hard to predict there exact position. However, the most probable locations electrons can be be found are described with the terms shells, subshells and orbitals. A shell contains subshells and orbitals are found within subshells. The shells are given names such as K, L, M, N, which correspond to the principal quantum numbers, n = 1, 2, 3, and 4 respectively. There are 4 major types of subshells that can be found in a shell. They are named as s, p, d, f. Each subshell is composed of several orbitals.

a. 1s; the s subshell has only one orbital. Therefore, the 1s subshell has one orbital

b. 4d; the d subshell has five orbitals. Therefore, the 4d subshell has five orbitals

c. 3p; the p subshell has three orbitals. Therefore, the 3d subshell has three orbitals

d. n = 3; the shell with n = 3 has the following subshells, 3s, 3p, 3d.the number of orbitals will be 1 + 3 + 5 = 9 orbitals. Therefore, the number of orbitals in n = 3 is nine orbitals

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3 years ago

How is petrol separated from the mixture of hydrocarbons in crude oil?

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By doing fractional distillation

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Explanation:

Alkali metals are the metals which belong to group 1 of the periodic table. As these elements have one valence electron so they are highly reactive in nature.

Some characteristics of metals are as follows.

Usually metals are hard in nature.
They have shiny surface.
Metals are malleable and ductile in nature.
Metals are good conductors of heat and electricity.

When these metals react with water then it leads to the formation of metal hydrides.

For example, $Li + \frac{3}{2}H_{2}O \rightarrow LiOH + H_{2}$

Thus, we can conclude the following for alkali metals:

a. What is the group number? - Group 1.

Are these metals reactive? - Yes

b. Do these metals occur freely in nature? - No

c. How many electrons are in their outer shell? - 1 valence electron

d. What are the three characteristics of ALL metals?

Usually metals are hard in nature.
They have shiny surface.
Metals are malleable and ductile in nature.

e. Are these metals soft or hard? - Both

f. Name the two most reactive elements in this group? - Lithium And Sodium

g. What happens when they are exposed to water? - They form hydrides.

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3 years ago