if an unknown mineral has a hardness between 5 and 9, what could you do to the mineral to find out more about its hardness?
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scratch test
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It will take 8 electrons in its valence shell.
.How many electrons will it take in its valence shell？
This non-metal usually forms 2 covalent bonds. This leads me to believe that it has 6 valence electrons, to begin with, and will take 2 more, one from each bond. Such that it ends with a full valence shell of 8 electrons.
In covalent bonds, non-metals share electrons to attain full valence shells.
How many electrons are present in nonmetal in their outermost shell?
Most of the non-metals have 4 to 7 electrons in their valence shells. Formation of ions: Non-metals tend to accept electrons in their valence shell to form negatively charged ions called anions.
Learn more about valence shell here: brainly.com/question/15076797
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In covalent bonds, non-metals share electrons to attain full valence shells.
This non-metal usually forms 2 covalent bonds. This leads me to believe that it has 6 valence electrons to begin with and will take 2 more, one from each bonds. Such that it ends with a full valence shell of 8 electrons.
(2) HC2H3O2 and H3PO4
(3) KHCO3 and KHSO4
(4) NaSCN and Na2S2O3
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Answer : The correct option is, (2)
Explanation :
Arrhenius theory : It sates that an acid is a type of substance that ionizes in the water to give the hydronium ion or hydrogen ion and a bases is a type of substance that ionizes in the water to give hydroxide ion
.
Or we can say that,
Arrhenius acid are those which can easily gives the hydrogen ion in a solution and Arrhenius base are those which can easily gives the hydroxide ion in a solution.
In option 1, can easily gives the hydrogen ion but
can not gives the hydrogen ion due to stronger O-H bonding. So, these formulas does not represent Arrhenius acids.
In option 2, and
can easily gives the hydrogen ion. So, these formulas represent Arrhenius acids.
In option 3, and
can not gives the hydrogen ion because both are the salts. So, these formulas does not represent Arrhenius acids.
In option 4, and
can not gives the hydrogen ion because no hydrogen present in the compound. So, these formulas does not represent Arrhenius acids.
Hence, (2) represent Arrhenius acids.
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Answer:
isotope. An isotope of a chemical element is an atom that has a different number of neutrons (that is, a greater or lesser atomic mass) than the standard for that element. The atomic number is the number of protons in an atom's nucleus.
Isotope Examples
Carbon 12 and Carbon 14 are both isotopes of carbon, one with 6 neutrons and one with 8 neutrons (both with 6 protons). Carbon-12 is a stable isotope, while carbon-14 is a radioactive isotope (radioisotope). Uranium-235 and uranium-238 occur naturally in the Earth's crust.
Answer:
Isotopes of same element have same atomic number but different mass number.
B.CO2 + H2O C6H12O6 + O2
C.6CO2 + 6H2O C6H12O6 + 6O2
D.6C6H12O6 + 6O2 6CO2 + H2O
E.C6H12O6 + O2 CO2 + H2O
F.6CO2 + 6H2O C6H12O6 + 6O2
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being specific being flexible
being authoritative
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Answer:
The correct answer is being authoritative.
Explanation:
Authoritative refers to permission to act without asking permission while being held responsible. While implementation refers to the conclusion of all the work in solving an issue and needs careful consideration to detail. There are three fundamental steps involved, that is, preparing and planning to implement the solution, implementing and observing the activity, and evaluating and studying the success of the action. Thus, in my opinion being authoritative would be a primary concern when implementing a solution.