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2 years ago

What mineral is this? Egg-sized piece. Transparent pink color with glassy luster. Shows conchoidal fracture. The hardness is 7.

Chemistry

2 answers:

fgiga [73]2 years ago

8 0

ruby

Explanation:

because it's ruby

ra1l [238]2 years ago

5 0

Answer: Pink Quartz

Explanation:

Quartz. Can come on different colours like pink, white, gray, purple, black, yellow or green.

Luster means Appearance, Quartz unlike Silica, looks like glass.

Conchoidal fracture: It´s how Quartz´s surface fractures on a smoothly curved way.

Hardness is mineral´s property of being scratched by others. Mohs scale of mineral hardness is used to classify a mineral as softer or not. In this case, quartz has a hardness of 7, that means it´s quite hard, since the scale starts in 1 and finishes in 10.

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Which of the following isoelectronic series is correctly ranked from largest ionic radius to smallest ionic radius? 1. N 3−, O 2

love history [14]

Answer:

Option 1: N⁻³ > O⁻² > F⁻ > Na⁺ > Mg⁺²

Explanation:

Ionic radius is the radius of an atom´s ion in ionic crystal structure. In an ion that lose an electron, to form a cation, the radius of the ion gets smaller, because the repulsion between electrons decrease because fewer electrons are present. Conversely, adding on electron to a neutral atom, to form an anion, causes electron - electron repulsions to increase, so the size of the radius of the ion gets bigger.

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We will use this principle to solve our problem.

In our case, the given ions are:

N⁻³ : Z = 7, e⁻ = 10
O⁻²: Z= 8, e⁻ =10
F⁻: Z = 9, e⁻ = 10
Na⁺: Z= 11, e⁻ = 10
Mg⁺²: Z=12, e⁻ =10

where Z= number of protons, and e⁻ = number of electrons.

Hence the decreasing order of ionic radius is:

N⁻³ > O⁻² > F⁻ > Na⁺ > Mg⁺²

Have a nice day!

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