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RUDIKE [14]
3 years ago
9

Write a brief passage describing a neutral atom of nitrogen-14 (N-14). Describe the number of protons, neutrons, and electrons i

n the atom, where each type of particle is located, and how the terms atomic number, mass number, and atomic mass are related to the particles. Use the periodic table to help you.
Chemistry
2 answers:
Inessa [10]3 years ago
5 0
In nitrogen-14, there are 7 protons, 7 neutrons, and 7 electrons. The protons and neutrons are in the nucleus, and the electrons are in the electron shells. The atomic number is the number of protons, the mass number is the number of protons AND neutrons, and the atomic mass is the average of the masses of all isotopes.
Nevertheless
3 years ago
Your answer should include all the following pieces of information. Check off each of the items you included in your answer. It contains seven protons in the nucleus. It contains seven neutrons in the nucleus. It contains seven electrons in orbitals around the nucleus. Its atomic number is its number of protons. Its atomic mass is the mass of protons and neutrons.
Genrish500 [490]3 years ago
5 0

<u>Answer:</u> This element has 7 protons, 7 electrons and 7 neutrons.

<u>Explanation:</u>

There are 3 subatomic particles present in an atom. They are: protons, electrons and neutrons.

  • <u>Protons:</u> They carry positive charger and are present in nucleus.
  • <u>Electrons:</u> They carry negative charge and are present around the nucleus.
  • <u>Neutrons:</u> They dos not carry any charge and are present in nucleus.

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Atomic mass is the sum of masses of each isotope each multiplied by their natural fractional abundance. This is also related to protons and neutrons present in an atom.

We are given:

An element having formula _7^{14}\textrm{N}

Atomic number = Number of electrons = Number of protons = 7

Mass number = 14

Number of neutrons = 14 - 7 = 7

Atomic mass of nitrogen = 14.01 amu

Hence, the given element has 7 protons, 7 electrons and 7 neutrons.

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A mixture of bases can sometimes be the active ingredient in antacid tablets. If 0.4884 g of a mixture of Al(OH)3 and Mg(OH)2 is
Nitella [24]

Answer:

54.7%

Explanation:

The reaction of neutralization will be:

Al(OH)₃ + Mg(OH)₂ + 5HNO₃ → Al(NO₃)₃ + Mg(NO₃)₂ + 5H₂O

The number of moles of HNO₃ added is the concentration multiplied by the volume (17.12 mL = 0.01712 L)

n = 1*0.01712 = 0.01712 mol

For the stoichiometry:

1 mol of Al(OH)₃  ---------- 5 moles of HNO₃

x ----------------------------------0.01712 mol

By a simple direct three rule:

5x = 0.01712

x = 3.424x10⁻³ mol of Al(OH)₃

For the stoichiometry, the number of moles of Mg(OH)₂ will also be 3.424x10⁻³.

The molar masses are:

Al(OH)₃: 27 g/mol of Al + 3*16 g/mol of O + 3*1 g/mol of H = 78 g/mol

Mg(OH)₂: 24 g/mol of Mg + 2*16 g/mol of O + 2*1 g/mol of H = 58 g/mol

The mass is the molar mass multiplied by the number of moles:

Al(OH)₃: 78*3.424x10⁻³ = 0.2671 g

Mg(OH)₂: 58*3.424x10⁻³ = 0.1986 g

The mass % of Al(OH)₃ in the mixture is its mass divides by the mass of the mixture, multiplied by 100%:

(0.2671/0.4884)x100% = 54.7%

5 0
3 years ago
A 2-kg bowling
Volgvan
So for the first one It's 784.56 J (GPE)

For the second one it's KE is equal to 100 J. If you can give me a few more minutes I'll try to get the GPE
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4 years ago
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Answer:

273k

Explanation:

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I dunno. Like... Is this a trick question? Trivia, maybe?

Nahhhhh...

It's just not telling us facts...SOME facts, but we need to use past learning to help us.

FIRST of all, what the heck does K even mean?

Is this a memo? A demo? A KO?

Okay, it's nither of these things.

So, let me tell you what the "K" means.

The K means "Kelvin" which is basically a word form for "-"

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And so... To bring objects to a COMPLEETE SKRRRRRRRRRRRRRRRRRRRRRRT...

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This means that the answer is 273k.

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3 years ago
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WITCHER [35]

Answer:

MgBr(aq) + (NH4)3PO4(aq) -------> NH4Br(aq) + Mg3(PO4)2(s)

Explanation:

4 0
3 years ago
Acrostic poem for matter
Feliz [49]

Answer:

M-Molecules are always moving

A-Anything that has mass and volume

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T-The states of matter are gas,liquid, and plasma

E-Evaporation makes a liquid turn to gas

R-Racing molecules make the space between the molucles increase

Explanation:

<h2>MATTER</h2>
7 0
3 years ago
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