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2 years ago

Question 15

Chemistry

1 answer:

Artyom0805 [142]2 years ago

6 0

Answer:

b. 600 k

hope it help

thank you so much.

tysm

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As the thermal energy of matter increases, its particles usually spread out, causing

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Answer:

As the thermal energy of matter increases, its particles usually spread out, causing the substance to expand.

Explanation:

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2 years ago

The elements in alkali metal and halogen groups of the periodic table are the most reactive since they only need to gain or lose

Anarel [89]

<h3>Answer:</h3>

Reactivity increases because the valence level is further from the nucleus of an atom.

<h3>Explanation:</h3>

The reactivity of elements in the periodic table depends on the position of the element in the periodic table.
The trend in the reactivity across the period and down the group depends on whether one is dealing with metallic elements or non-metallic elements.
Reactivity of metals such as alkali metals and alkali-earth metals increases down the group as the number of energy levels increases making valence electrons to be further from the nucleus.
Reactivity of non-metallic groups such as halogen decreases down the group as energy levels increase which reduces the nuclear attraction of the valence electrons to the nucleus.

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2 years ago

An atom with which atomic diagram is most similar to calcium?

Dominik [7]

Answer:

Explanation:

Calcium is an element with a total of 20 electrons.

It has 4 shells with a configuration of:

2, 8, 8, 2

Option C is the most similar to calcium but the number of shells is not complete.

It still requires two more shells with 8 and two electrons respectively.

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2 years ago

How do scientists determine where the plate<br> boundaries are?

pochemuha

Answer:

through ecological science

Explanation:

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What are the Common compounds of niobium in which it is found

blagie [28]

Explanation:

Common Compounds of Niobium Nb

[Nb+3, Nb+5]

Compound NameFormulaMolar Mass

Niobium(III) OxideNb2O3233.811

Niobium(III) SulfateNb2(SO4)3474.0006

Niobium(V) PhosphateNb3(PO4)5753.576

Niobium(V) BromideNbBr5492.4264

Niobium(V) PentoxideNb2O5265.8098

Niobium OxychlorideNbOCl3215.2648

Niobium(V) IodideNbI5727.4287

Niobium(V) PentachlorideNbCl5270.1714

Niobium(V) ThiocyanateNb(SCN)5383.3184

Niobium(III) ChlorideNbCl3199.2654

Niobium(V) Dihydrogen PhosphateNb(H2PO4)5577.84259

Niobium NitrideNbN106.9131

Niobium(III) DichromateNb2(Cr2O7)3833.77676

Niobium HydroxideNb(OH)3143.9284

Niobium(V) PerchlorateNb(ClO4)5590.15938

Niobium(V) HypochloriteNb(ClO)5350.16838

Niobium(III) HypochloriteNb(ClO)3247.26358

Niobium(V) CarbonateNb2(CO3)5485.85726

Niobium(III) TartrateNb2(C4H4O6)3630.02564

Niobium(III) ChromateNb2(CrO4)3533.79386

Niobium(V) HexafluorosilicateNb2(SiF6)5896.192356

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