CHEMISTRY MIDDLE SCHOOL

Review the types of elements that create ionic bonds aswell as the types of elements that create covalent bonds.
• N2 • CCl4 • SiO2
• AlCl3 • CaCl2 • LiBr

Answers

Answer 1

Answer:

Answer:

N2 Covalent

CCl4 Covalent

SiO2 Covalent

AlCl3 Covalent

CaCl2 Ionic

LiBr Covalent

Explanation:

With covalent bonds, there is a sharing of electron pairs between the atoms.

With ionic bonds, there is complete transfer of valence electrons between atoms. Formed by the interaction of a metal with a non-metal.

Where:

Electrons aren't transferred in covalent bonds.

Protons aren't transferred in covalent bonds

Protons aren't shared in covalent bonds

N3-

C4+

Cl-

Si4+ = Metal

O2- = Non-metal

Al3+ = Metal

Li+ = Metal

Ca2+ = Metal

Br 1-, 1+, 5+ = Halogen

N2 = N3- and N3- Covalent

CCl4 = C4+ and Cl- x4 Covalent

SiO2 = Si4+ and O2- x 2 Metal with non metal Covalent

AlCl3 = Al3+ and Cl- x 3 Covalent Though this one is complex as to why because it seems like it should be ionic

CaCl2 = Ca2+ and Cl- x 2 Metal with non-metal Ionic

LiBr = Li+ and Br- Covalent as neither is a non-metal

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what will happen to water in a cup if the cup is placed inside a sealed bag and left in a warm area ?

Answers

The water will stay there nothing happens to the water in the bag.

The water may begin to evaporate and you might see condensation on the inside of the bag

What are the three forms of water and what are the scientific names when they change into each other

Answers

solid liquid and gas

when it changes from a:
solid
to a
   liquid: melting, fusion
   gas: sublimation
liquid
   to a
   solid:freezing
   gas:vaporization
gas
   to a
   solid:condensation, deposition
   liquid: condensation, liquefacation

gas liquid and solid gas is when the water evaporates. liquid when thew water is at room temp and solid when it is cooled below 32 degrees farenheit

Examples of a cell wall

Answers

✡ Answer: A example of this is a wall surrounding fungi (a cell wall)✡

- - Why?
Because this is a good example of a cell wall, and it is commonly used in most science lessons (in my school atleast)

✡Hope this helps✡

a gate protecting the house inside

The planet we call Earth has how many main layers

Answers

The layers of the Earth are the following:

outermost: crust
mantle
outter core
innermost: inner core

(that's 4 layers)

One can also divide them into smaller layers.

Which statement about reversible reactions is correct? At equilibrium, the forward and reverse reactions stop at the appropriate concentrations. At equilibrium, the forward and reverse reactions continue indefinitely. At equilibrium the rate of reaction of products divided by the rate of reaction of reactants equal the equilibrium constant, K.

Answers

The correct answer is At equilibrium the rate of reaction of products divided by the rate of reaction of reactants equal the equilibrium constant, K.

The chemical reactions which occurs in forward direction as well as backward direction under particular conditions is said to be reversible reactions. In these reactions, concentration of reactants and products remain same and both reactions i.e. forward and backward reactions occurs at similar rates.

Equilibrium is the state of reaction in which formation of reactants into products and formation of products into reactants occurs simultaneously at similar rate.

Now, equilibrium constant is equal to the ratio of concentration of the products to the concentration of the reactants.

For example: $A+B\rightarrow C+D$