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3 years ago

What is Avogadro's number and mole?

Chemistry

2 answers:

sdas [7]3 years ago

8 0

Answer:

one hundred (100).....

Alex_Xolod [135]3 years ago

3 0

Answer:

Avogadro's number is 6.0221409e+23

1 mole equals 6.022×1023 atoms, molecules, protons e.t.c. To convert from mole to atoms, multiply the molar amount by Avogadro's number.

Explanation:

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Determine the number of protons, electrons, neutrons, valence electrons and valency in Oxygen atom (O) and Oxide ion (O2-). Comp

wolverine [178]

Answer:

Atom (O) Ion (O²⁻)

Protons 8 8

Electrons 8 10

Neutrons 8 8 ← only for the oxygen-16 isotope.

* The number of neutrons depends on the specific isotope. It is equal to the mass number of the isotope less the number of protons.

Explanation:

Oxygen is the element with atomic number 8. That means that the oxygen atoms have 8 protons.

Protons have relative positive charge equal to +1 and electrons have relative negative charge -1: same magnitude opposite sign.

Thus, the neutral oxygen, O, has also 8 electrons and 8 protons.

As per the number neutrons it depends on the specific isotope.

The isotopes are identified by the mass number, which is the number of protons plus neutrons. For instance, oxygen-16 isotope has mass number 16, 8 protons and 8 neutrons, while oxygen-15 isotope has mass number 15, 8 protons and 7 neutrons.

Oxide ion O²⁻ is the oxygen ion with -2 charge, meaning that it has 2 more electrons than protons. Then, it has 8 protons and 10 electrons, again the number of neutrons depend of the specific isotope.

The stability of an atoms or ion refers to its trend to remain in the same state or react to form another species. The ions O²⁻ are less stable than the neutral atoms O, because the negative charge will be attracted to any positive ion so ti will react faster than the neutral oxygen atom (O).

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4 years ago

Characteristics of α, β, and γ rays

Allisa [31]

Answer:

1. it is symbolized as 4/2 He : Alpha rays

2. it has the weakest penetrating power : Alpha rays

3. It is a high-speed electron : beta rays

4. It possesses neither mass nor charge : gamma rays

5. it has the strongest penetrating power : beta rays

6. its is symbolized as 0/-1e : beta rays

7. it is the most massive of all the components: alpha rays

Explanation:

Let us consider the characteristics of each of the given rays.

α rays: These are helium nucleus so are symbolized by $He^{4}_{2}$

Due to two protons and two neutrons unlike beta and gamma rays these are the most massive and thus have least penetrating power among the three given rays.

β rays: These are actually high speed electrons and are symbolized as $^{0}_{-1}e$ . Due to lesser mass than alpha rays they are more penetrating than them however less penetrating than gamma rays.

γ rays : They carry no charge or mass. Due to least massive among the three rays they have highest penetrating power.

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What is Avogadro's number and mole?​

What is Avogadro's number and mole?