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3 years ago

An __________ is defined as a substance that ionizes in water.

Chemistry

2 answers:

lianna [129]3 years ago

4 0

An electrolyte is defined as a substance that ionizes in water.

Allisa [31]3 years ago

4 0

It would be both "the process of becoming an ion" and "a polar covalent molecule forming ions"

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The most reactive metals are located in which area of the periodic table?

SCORPION-xisa [38]

The answer is b.Far left

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3 years ago

The following reaction does not proceed to a product: H2O + Cu --> no reaction. Why is that?

Anettt [7]

I think the correct answer would be because copper has a lower activity than hydrogen and cannot replace the bonds in it. Substances that are not oxidizing do not react with copper since the redox potentials are very low. Hope this answers the question.

5 0

4 years ago

Read 2 more answers

Find the amount in grams of 2.0 x 10^23 atoms Cu

-Dominant- [34]

Answer:

21.182 g

Explanation:

There are about (6.0)(10^23) atoms in one mole of a substance, so the given sample has about 0.333 mol of Cu.

The atomic mass of Cu is 63.546 g/mol, meaning that the answer is about 21.182 g

5 0

2 years ago

Arrange the elements in decreasing order of first ionization energy.

just olya [345]

Answer:

The decreasing order of first ionization energy: Se > Ge > In > Cs

The decreasing order of first ionization energy: x > y > z

Explanation:

Ionization energy refers to the energy needed to completely pull out an electron from the valence shell of a neutral gaseous atom.

First ionization energy is the energy involved in the removal of first valence electron.

In the periodic table, down the group, as atomic radius of elements increases, the ionization energy decreases

Whereas, across a period, as atomic radius of elements decreases, the ionization energy increases.

PART (A):

Position of the given elements in the periodic table:

Indium (In): Group 13, period 5

Germanium (Ge): Group 14, period 4

Selenium (Se): Group 16, period 4

Caesium (Cs): Group 1, period 6

Thus, the increasing order of atomic radius: Se < Ge < In < Cs

Therefore, the decreasing order of first ionization energy: Se > Ge > In > Cs

PART (B):

Given elements:

element x: radius = 110 pm

element y: radius = 199 pm

element z: radius = 257 pm

Thus, the increasing order of atomic radius: x < y < z

Therefore, the decreasing order of first ionization energy: x > y > z

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3 years ago

An atomic spectra is like a _________ for an element, in that it is unique for that element and can be used in identification.

adell [148]

Atomic number, because the atomic number is unque to each individua element.

3 0

3 years ago