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BigorU [14]
3 years ago
11

HELP !!!!!!! ASAP !!!!!!!!!!!!!!

Chemistry
2 answers:
Dmitry [639]3 years ago
4 0
The color changes, heat change, smell change, are a few
timurjin [86]3 years ago
4 0

Answer:

The color changes, heat change, smell change, are a few

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Matter does not exist in which scenario? parts of outer space where there is no air or atoms salt dissolved in water air in the
neonofarm [45]

Answer:

parts of outer space where there is no air or atoms

Explanation:

Matter is made up of atoms. Similar to how your cells make your body, atoms make up all and everything. This since outer spaces doesn't have atoms, it doesn't have matter as well (at least not the normal matter, it does have dark matter, which is a whole can of worms that should not be opened)

6 0
3 years ago
Read 2 more answers
All atoms of a given element are identical in that they have the same number of
Sonbull [250]

Answer:

A) protons

Explanation:

Protons are what give atoms their elements. If one atom has a differing number of protons from another atom, they will never be the same element.

8 0
2 years ago
The atomic symbol Superscript 206 subscript 82 upper P b. represents lead-206 (Pb-206), an isotope that has 82 protons and 124 n
Serggg [28]

Answer:

\left \{ {{y=206} \atop {x=82}}Pb \right.

Explanation:

isotopes are various forms of same elements with different atomic number but different mass number.

Radioactivity is the emission of rays or particles from an atom to produce a new nuclei. There are various forms of radioactive emissions which are

  • Alpha particle emission  \left \{ {{y=4} \atop {x=2}}He \right.
  • Beta particle emission    \left \{ {{y=0} \atop {x=-1}}e \right.
  • gamma radiation             \left \{ {{y=0} \atop {x=0}}γ \right.

in the problem the product formed after radiation was Pb-206. isotopes of lead include Pb-204, Pb-206, Pb-207, Pb-208. they all have atomic number 82. which means the radiation cannot be ∝ or β since both radiations will alter the atomic number of the parent nucleus.

Only gamma radiation with \left \{ {{y=0} \atop {x=0}}γ \right. will produce a Pb-206 of atomic number 82 and mass number 206 , since gamma ray have 0 mass and has 0 atomic number.equation is shown below

\left \{ {{y=206} \atop {x=82}}Pb\right ⇒ \left \{ {{y=206} \atop {x=82}}Pb\right +  \left \{ {{y=0} \atop {x=0}}γ\right.

Thus the atomic symbol is \left \{ {{y=206} \atop {x=82}}Pb\right

8 0
3 years ago
Read 2 more answers
An experiment applies heat to a substance and produces a gas that is a new and different substance. Choose the true statement.
bearhunter [10]
Well if the change is reversible then it is a physical change, but if not then it is a chemical change.
4 0
3 years ago
How can we remove the hardness of water by boiling?​
pantera1 [17]

Heat makes it softer

5 0
3 years ago
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