High school Chemistry help » Elements and also Compounds » Elements and also Atoms » Identifying facets
Explanation:

The identity of an aspect is determined by the number of protons. One cannot alter the number of protons without altering the identity of the element. By adding a proton, the atom number rises by one and also the facet identity changes.

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Number that neutrons have the right to be transformed to create isotopes. Number of electrons deserve to be altered to produce ions.


Explanation:

An facet is identified by its number of protons. Varying the variety of neutrons will readjust the isotope of an element and also varying the variety of electrons will create an ion, but transforming the number of protons changes the identification of the aspect itself. Nitrogen has atomic number seven, and is the only element that have the right to have 7 protons. The provided configuration is because that an isotope that nitrogen. Because there space eight neutrons, this atom would certainly be for nitrogen-15.





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Explanation:

Elements are presented on the routine table. Compounds space made as soon as one or more element is linked to form a molecule. The the smallest unit of an facet is one atom, while the the smallest unit that a compound is a molecule.

Of the provided answer choices, only satisfies the concern criteria. This is the formula for a molecule of bromine gas, made of 2 bromine atoms.

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is a salt ion, representing one atom of sodium that has actually lost one electron to get a optimistic charge. Though it consists of only one element, it is not a molecule.
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is a solitary carbon atom, and likewise does not stand for a molecule.

is the formula for hydrochloric acid and is the formula for water. Both of this compounds room composed of molecules, however hydrochloric acids consists of both hydrogen and chlorine atoms, and also water includes both hydrogen and also oxygen.


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Example inquiry #1 : Identifying aspects


Is it feasible to kind a compound from only one element?


Possible Answers:

Yes; compounds and elements room synonyms


No; a compound have to contain multiple elements


Yes; benzene ring contain just carbon


Yes; diatomic gases room compounds the consist of only one element


Yes; water is a link that consists of just one element


Correct answer:

Yes; diatomic gases are compounds the consist of just one element


Explanation:

Elements are identified by the variety of protons in a given atom, and also the atom is the the smallest unit of one element. In contrast, a compound is defined by the identity and organization of multiple atoms, v the the smallest unit of a compound being a molecule.

Some compounds perform contain just one element, such as diatomic gases or graphite. Benzene rings space composed of carbon and hydrogen, when water molecule contain hydrogen and also oxygen.


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Example concern #5 : Identifying facets


Which the the following atomic properties, if known, will reveal the identification of the element?


Possible Answers:

More than among these answer could allow us to determine the offered atom


The variety of protons


The atom mass


The variety of electrons


The variety of neutrons


Correct answer:

The variety of protons


Explanation:

There are two properties that can be offered to recognize an element: the atomic number or the variety of protons in an atom.

The variety of neutrons and number of electrons are typically equal come the number of protons, but can vary relying on the atom in question. Various ions and isotopes will change the variety of neutrons and electrons, making this properties unreliable identifiers. Similarly, atomic mass will vary v the variety of neutrons present and cannot be offered to establish atomic identity.


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Example inquiry #6 : Identifying aspects


Which the the adhering to phase labels are offered for every diatomic elements?


Possible Answers:

(r)


(aq)


(g)


(l)


(s)


Correct answer:

(g)


Explanation:

Diatomic aspects are frequently referred to as diatomic gases because whenever they space by themselves, they link to themselves (that is wherein the "2" subscript come from). Anytime diatomic facets have that "2" subscript, they have the gas (g) step label. Because that example, 

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.


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Example inquiry #7 : Identifying elements


What is the chemical symbol for potassium?


Possible Answers:

P


Pt


Po


Na


K


Correct answer:

K


Explanation:

The symbol because that potassium originates from the latin word because that potassium, kalium. That is why the chemical symbol because that potassium is

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.


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Example concern #8 : Identifying elements


Which element additionally goes through its latin name, ferrum?


Possible Answers:

Iron


Platinum


Lead


Gold


Copper


Correct answer:

Iron


Explanation:

The word because that iron in latin is ferrum, thus, the chemical symbol because that iron is

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 because that its latin name.


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Example concern #9 : Identifying aspects


Which aspect has 42 protons?


Possible Answers:

Technetium


Mercury


Molybdenum


Gold


Niobium


Correct answer:

Molybdenum


Explanation:

Remember, the variety of protons is equal to the atomic variety of the element. Look at the regular table and also find the facet with atom number 42, it corresponds to molybdenum.

See more: How To Move Snorlax Fire Red ? How Do You Move Snorlax On Route 16 In Fire Red


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Example question #10 : Identifying elements


Which aspect has 17 electrons?


Possible Answers:

Argon


Silicon


Sulfur


Phosphorus


Chlorine


Correct answer:

Chlorine


Explanation:

Since atoms room neutral, the number of electrons have to equal the variety of protons (to balance the an unfavorable and hopeful charges). For this reason the aspect with 17 electrons also has 17 protons. The variety of protons is same to the atomic number of the element. Usage the regular table to discover the facet with atom number 17, chlorine. Note that ions room not neutral, thus they have actually unequal number of protons and also electrons. Also, isotope of the same element contain differing numbers of neutrons, which likewise affects the weight of the isotope.


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