1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anna11 [10]
3 years ago
10

Why does magnesium oxide have a high melting point?

Chemistry
1 answer:
Mandarinka [93]3 years ago
5 0

Magnesium oxide is an ionic compound ( because it consists of a metal and a non-metal)

In ionic compounds, electrons from the outer shell exchange between the atoms so that they each get a full outer shell. Once these electrons are exchange, the atoms will become ions. One ion will have a positive charge, and the other ion will have a negative charge. The positive and negative ions then bond strongly together in a lattice structure, due to the <u>electrostatic forces of attraction</u>.

These <u>electrostatic forces of attraction</u> are very strong and require a lot of energy to break, as such the compound will have <u>a high melting point</u>.

__________________________________________

Now lets look at the ionic bonding between magnesium and oxygen:

In the outer shell of Magnesium, there are 2 electrons.

In the outer shell Oxygen, there are 6 electrons.

Magnesium gives it's two electrons to Oxygen, so that the Oxygen now has a full outer shell of 8 electrons. However, since Oxygen gained two electrons, it will form a negatively charged ion with a charge of -2.

Since Magnesium lost the two electrons, it's second shell (which has 8 eletrons) now becomes the outer shell. So Magnesium also now has a full outer shell. But since it has lost two electrons, it becomes a positively charged ion with a charge of + 2.

The positive Magnesium ion and negative Oxygen ion and now strongly attracted to each other, and form a strong ionic compound (magnesium oxide) with a lattice structure.

The <u>electrostatic forces of attraction</u> between the positive Magnesium and negative Oxygen are so strong that <u>a lot of heat and energy are needed to break them</u>.

<u>Therefore magnesium oxide has a high melting point.</u>

You might be interested in
How long should i cook my pizza rolls?<br><br><br> pwease hewp im hunggy
mixer [17]

Answer:

depends on how many you have...

Explanation:

4 0
3 years ago
Read 2 more answers
“Enter the conjugate acids of no2- and no3-“
Rainbow [258]

Answer:

nitrit,nitrat

4 0
3 years ago
Which planet has these characteristics? - the only planet to have liquid water on its surface - almost three quarters of its sur
sp2606 [1]
Well assuming we have all of these, earth
4 0
3 years ago
Calculate hydrochloric acid (umol)in 200 ul of a<br> 0.5173Msolution of acid?
strojnjashka [21]

<u>Answer:</u> The moles of hydrochloric acid is 1.0346\times 10^{-4}\mu mol

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}

Or,

\text{Molarity of the solution}=\frac{\text{Micro moles of solute}\times 10^6}{\text{Volume of solution (in }\mu L)}}

We are given:

Molarity of solution = 0.5173 M

Volume of solution = 200\mu L

Putting values in above equation, we get:

0.5173M=\frac{\text{Micro moles of HCl}\times 10^6}{200\mu L}\\\\\text{Micro moles of HCl}=1.0346\times 10^{-4}\mu mol

Hence, the moles of hydrochloric acid is 1.0346\times 10^{-4}\mu mol

7 0
3 years ago
A cylinder containing 14.68 L of helium gas at a pressure of 169.3 atm is to be used to fill toy balloons to a pressure of 1.071
Naily [24]

Answer: The maximum number of balloons that can be inflated is 955

Explanation: Please see the attachments below

4 0
3 years ago
Other questions:
  • The density of sea water is 1.029 kilograms per liter. What is the density of
    13·1 answer
  • Which of the following should be done when designing an experiment for a controlled scientific investigation?
    10·2 answers
  • What is radium used for
    10·1 answer
  • n order to balance the following reaction S n+Cl 2→ S nCl 4, which coefficient should be inserted in front of chlorine?
    11·1 answer
  • I am confuse and need help
    10·1 answer
  • How are protons and neutrons found?
    11·2 answers
  • A 50.0 mL solution of 0.133 M KOH is titrated with 0.266 M HCl . Calculate the pH of the solution after the addition of each of
    10·1 answer
  • Why is it important to know the number of valence electrons in an atom?
    11·1 answer
  • A science teacher asked students to calculate the density of a toy block. The mass of the block was 110 grams and the volume of
    14·1 answer
  • What was alchemy?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!