How many neutrons does an element have whose electronic formula is 1s²2s²2p⁵

N⁻³ and Na⁺ have same A Atomic no. B Mass No. C No. of electrons D No. of neutrons

Answer:

C.) No. of electrons

Explanation:

A.) is incorrect. The atomic number represents the number of protons in an element. Nitrogen (N) and sodium (Na) always have a differing amount of protons.

B.) is incorrect. The mass number represents the number of protons and neutrons in an element. The number of neutrons and protons are specific to each element (disregarding isotopes). When elements ionize, these amounts are not altered.

C.) is correct. When an element becomes an ion, the number of electrons change. When nitrogen gains 3 electrons and sodium loses 1 electron, they end up having the same number of electrons (10).

D.) is incorrect. When elements ionize, the number of neutrons does not change. The only way two different elements could have the same number of neutrons is if at least one of the elements is an isotope. Isotopes are two or more atoms of the same element that differ in their amounts of neutrons.

3 0

2 years ago

If you had 1.50 g of ZnSO4.7H20, zinc sulfate septahydrate, how many grams of water will there be?

MariettaO [177]

Answer:

There will be 1.50 gram of water

5 0

3 years ago

Identify all actions that you should take if you have chipped or broken glassware. Notify your teacher. Have the custodian clean

12345 [234]

Explanation:

If you have chipped or broken glassware then it is very important that you should take precaution yourself by conveying about it to your teacher and class mates.

By doing so you are making everybody aware to be cautious of the chipped or broken glassware.

Also, it is advised that you should dispose of it in the designated glass waste area.

Therefore, we can conclude that all actions that you should take if you have chipped or broken glassware as as follows.

Notify your teacher.

Notify classmates.

Dispose of it in the designated glass waste area.

8 0

2 years ago

Read 2 more answers

Which of the following statements is false? Check all that apply. Gases are far more compressible than liquids The volume occupi

Sergio039 [100]

Answer:

The false statement is: 3. Because liquid water and liquid carbon tetrachloride do not mix, neither do their vapors

Explanation:

Gas is a state of matter, that has less density than liquids and solids. The gaseous particles have low intermolecular forces and thus they can move freely.

It is a very compressible fluid that has no fixed shape. Gas occupies the whole container in which it is stored, thus taking the shape of the container. Therefore, the volume of the gas is equal to the volume of the container.

Polar liquid like water (H₂O) and nonpolar liquid like carbon tetrachloride, are immiscible. However, in the gaseous state, their vapors form a homogeneous mixture.

5 0

3 years ago

The properties of an unknown substance can be compared to the properties of a known substance to identify the unknown substance.

Nitella [24]

Answer: Physical properties are those that can be determined or measured without changing the composition or identity of the substance. These properties include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.

Explaination:

By using Physical properties unknown substance can be identified as it involves determination of a substance with out changing their composition or property include color, odor, taste, density, melting point etc.

What are the difference between physical and chemical property ?

Chemical properties can be observed or measured when a substance undergoes any type of changes chemically while Physical properties can be observed without changing anything.

In chemical property, chemical reaction is conducted to show the property of the substance while in physical property No chemical reaction occur.

Chemical properties related to chemical bonds while Physical properties do not have such a relationship.

Chemical properties include radioactivity, toxicity, flammability, heat of combustion, etc. while physical properties include Molecular weight, boiling point, melting point, freezing point, volume, mass, length, density shape, solubility, etc.

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5 0

10 months ago

How many neutrons does an element have whose electronic formula is 1s²2s²2p⁵​

How many neutrons does an element have whose electronic formula is 1s²2s²2p⁵