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Marysya12 [62]
3 years ago
15

What is the only thing that changes in a chemical reaction

Chemistry
1 answer:
kirill [66]3 years ago
3 0
Bbbbbbbbbbbbbbbbbbbbb
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A.explain what is meant by term
mrs_skeptik [129]

Answer:

Explanation:

1. Atomic numbers:

Atomic number is the number of protons in an atom. It is one of the most diagonistic and representative number used in identifying an atom. The periodic table of element arranges elements based on this number.

No two elements have the same atomic number.

Protons are positively charged particles in an atom.

  • In a neutral atom, the atomic number is the same as the number electrons since electrical neutrality is attained when the number of protons and electrons are the same.
  • The atomic number determines the position of an atom on the periodic table and it is unique for every atom.

2.

Periodic patterns

These are trends on that can be predicted on the periodic table because they shew regularities down a group or sometimes across the period.

Some of these trends are atomic radius, electronegativity, metallicity, nuclear charge e.t.c

Properties of elements can be predicted using these patterns even before they are discovered.

b.

Physical property shared by Helium, Argon and Neon is that they are all gases. All group 8 elements are called noble or inert gases.

Chemical property of these elements: they are chemically unreactive.

These gases are very stable having complete electronic shell configuration. Every atom on the periodic table tries to attain the state of the noble gases.

C.

Noble Gases/ Inert Gases/ Group O elements

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3 years ago
In this forest, trees block much of the sunlight from reaching the ground. The branches of trees grow up and out to reach as muc
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Ierofanga [76]

i dont now but thaks you po por the pionts

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HELP PLEASE!! (100 points)
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Answer:

As you cool a matter to absolute zero, their kinetic energy reduces significantly and the molecules slows down and begins to aggregate together. ... As heat is added, the molecules gain more kinetic energy. This shown in their increase motion. When heat is withdrawn, the particles slows down hope this helped

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Which statement is true of a reversible reaction at equilibrium?
Vedmedyk [2.9K]

Answer:

D.

The concentration of reactants and the concentration of products are constant.

Explanation:

pls mark as brainliest

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