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kifflom [539]
4 years ago
5

What is the electron configuration of an element with the atomic number 26

Chemistry
1 answer:
ra1l [238]4 years ago
3 0

Answer:

The electron configuration for Iron (Fe) with 26 electrons is as follows 1s²2s²2p⁶3s²3p⁶4s²3d⁶ (the superscripts add up to 26) or the Noble gas [Ar] 4s²3d⁶

Explanation:

The subshells fill up in the order 1s, 2s,2p, 3s,3p,4s,3d... (etc)  the subshells have the following number of e⁻ (electrons) s: 2, p:6, d:10, f:14. I attached the subshell levels and where to find them on the periodic table that I made when I taught this to myself after lecture. You can use the noble gas from the previous row to make this simpler to write.

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Elanso [62]
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m=609.0 g

p=m/v

p=609.0/84.0=7.25 g/cm³
8 0
3 years ago
1. What is the density of a 75 g block of wood measuring 12 cm x 8 cm x 9 cm?
qwelly [4]

Answer:

0.087 g/cm^3

Explanation:

Density is Mass : Volume.

Volume = 12 x 8 x 9 = 864 cm^3

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6 0
3 years ago
Hydrogen ion reacts with zinc to produce_____ gas?
WINSTONCH [101]

▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓

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6 0
3 years ago
Determine the number of charged particles in nucleus of calcium atom then deduce the number of electrons
Dafna1 [17]

Answer:

detail is given below.

Explanation:

The charged particles of nucleus are protons while neutrons are neutral having no charge.

We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus.

Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.

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Symbol of neutron= n⁰  

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3 0
3 years ago
3. How many grams of aluminum can be heated from 90°C to 120°C if 500 J of heat energy are applied?
IgorLugansk [536]

<u>We are given:</u>

Initial Temperature = 90°c

Final Temperature = 120°c

Heat applied(ΔH) = 500 Joules

Specific heat(c) = 0.9 Joules / g°C

Mass of Aluminium(m) = ?

<u>Change in temperature:</u>

ΔT = Final temp. - Inital Temp.

ΔT = 120 - 90

ΔT = 30°c

<u>Calculating the mass:</u>

We know the formula:

ΔH = mcΔT

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500 = m(0.9)(30)

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m = 500/27

m = 18.52 grams

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3 years ago
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