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netineya [11]
3 years ago
11

How many electrons must calcium lose to satisfy the octet rule?

Chemistry
1 answer:
earnstyle [38]3 years ago
8 0

Answer:

Lose 2 electrons

Explanation:

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What is the atomic number of an element that has seven protons and eight neutrons and seven electrons?
Dmitrij [34]

Answer:

Nitrogen has an atomic number of 7 (Z=7) because it has 7 protons in its nucleus. Some nitrogen atoms have an atomic mass number of 15 (A=15). A is the number of neutrons plus protons in the nucleus. However, we already know that there are 7 protons

7 0
3 years ago
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Water is made of polar molecules, and oil is made of nonpolar molecules. Based on your observations, which molecules attract eac
victus00 [196]

Based on observation of polar and non-polar molecules, polar molecules would attract each other more strongly.

<h3>What are polar and non-polar molecules?</h3>

Polar molecules are those molecules that can ionize or dissociate into their respective positive and negative ions when in an aqueous solution.

Nonpolar molecules, on the other hand, are not ionic i.e. not dissociating into ions when dissolved in water.

Polar molecules like water (H2O) contains an uneven distribution of cations (+) and anions (-), hence, would be more attracted to one another than nonpolar molecules that have an even distribution of ions.

Learn more about polarity at: brainly.com/question/16106487

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3 0
2 years ago
A series of enzymes catalyze the reactions in the metabolic pathway X → Y → Z → A. Product A binds to the enzyme that converts X
Gnom [1K]

The question is incomplete as it does not have the option which are:

A. A coenzyme.

B. An allosteric inhibitor.

C. The substrate.

D. An intermediate.

E. A competitive inhibitor.

Answer:

An allosteric inhibitor.

Explanation:

An allosteric inhibitor is a molecule which binds to the site other than the active site but inhibits the action of the Enzyme and thus the product.

The allosteric inhibitor is considered a non-competitive inhibitor which after binding to the enzyme cause some conformational changes which further changes the structure of the active site and thus substrate no longer binds the enzyme. This molecule thus inhibits the production.

Thus, An allosteric inhibitor is correct.

7 0
3 years ago
The diagram shows an early model of the atom. It was suggested by JJ Thompon. The atom was thought to be positively charged
Usimov [2.4K]

Answer:

The quantum model of atom

3 0
3 years ago
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A gas mixture has a total pressure of 0.51 atm and consists of He and Ne. If the partial pressure of He in the mixture is 0.32 a
sp2606 [1]

Explanation:

Relation between total pressure and mole fraction is as follows.

                   P_{1} = P^{o}x_{1}

where,     P_{1} = partial pressure of gas 1

                x_{1} = mole fraction of gas 1

                P^{o} = total pressure of the gases

Also,  it is known that x_{1} + x_{2} = 1

or,               x_{2} = 1 - x_{1}

It is given that total pressure of gas mixture is 0.51 atm and partial pressure of helium is 0.32 atm.

Hence, calculate the mole fraction of helium gas present in the given mixture as follows.

                P_{He} = P^{o}x_{He}

                0.32 atm = 0.51 atm \times x_{He}

                    x_{He} = 0.63

As, x_{He} + x_{Ne} = 1

so,             x_{Ne} = 1 - x_{He}

                               = 1 - 0.63

                               = 0.37

Hence, calculate the partial pressure of Ne as follows.

                    P_{total} = P_{He}x_{He} + P_{Ne}x_{Ne}

            0.51 atm = 0.32 atm \times 0.63 + P_{Ne}\times 0.37    

                   0.51 atm = 0.2016 atm + 0.37 \times P_{Ne}

                       0.3084 atm = 0.37 \times P_{Ne}

                            P_{Ne} = \frac{0.3084 atm}{0.37}

                                        = 0.834 atm

Thus, we can conclude that the partial pressure of the Ne in the mixture is 0.834 atm.

8 0
3 years ago
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