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2 years ago

Which of the following elements is most nonmetallic - most wanting of electrons?

Chemistry

1 answer:

Ierofanga [76]2 years ago

3 0

Answer:

B. Fluorine

Explanation:

Nonmetallic character increases from bottom to top in a Group and from left to right in a period (see image).

Thus, the most nonmetallic elements are at the upper right corner of the Periodic Table.

We ignore the noble gases, because they are quite unreactive.

So, the element that most “wants” an electron is fluorine.

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Write the isotopic symbol for the following (show your work) a) An isotope of iodine whose atoms have 78 neutrons b) An isotope

morpeh [17]

Answer:

For a: The isotopic representation of iodine is $_{53}^{131}\textrm{I}$

For b: The isotopic representation of cesium is $_{55}^{137}\textrm{Cs}$

For c: The isotopic representation of strontium is $_{38}^{52}\textrm{Sr}$

Explanation:

The isotopic representation of an atom is: $_Z^A\textrm{X}$

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

For a:

We are given:

Number of neutrons = 78

Atomic number of iodine = 53 = Number of protons

Mass number = 53 + 78 = 131

Thus, the isotopic representation of iodine is $_{53}^{131}\textrm{I}$

For b:

We are given:

Number of neutrons = 82

Atomic number of cesium = 55 = Number of protons

Mass number = 55 + 82 = 137

Thus, the isotopic representation of cesium is $_{55}^{137}\textrm{Cs}$

For c:

We are given:

Number of neutrons = 52

Atomic number of strontium = 38 = Number of protons

Mass number = 38 + 52 = 90

Thus, the isotopic representation of strontium is $_{38}^{52}\textrm{Sr}$

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3 years ago

Referring to the experiment in which the scientists studies how long it

pshichka [43]

Answer:

different sizes of the parachute

Explanation:

this is what is being changed throughout the experiment

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2 years ago

Oxyacids contains at least one h+ and an oxyanion. the " sulfurous " oxyacid contains the oxyanion ________.

Ulleksa [173]

The correct answer is Oxyanion Nitrite. Oxyanion is referred to as an ion which contains one or more oxygen atoms that are bonded to another chemical element. It has a generic formula of A. xO z− y, wherein A, stands for a chemical element, while O, stands for an Oxygen atom

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3 years ago

Which of the following statements concerning coordinate covalent bonds is correct? Group of answer choices One of the atoms invo

lys-0071 [83]

One of the atoms involved must be a metal and the other a nonmetal

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2 years ago

In a certain acidic solution at 25 ∘c, [h+] is 100 times greater than [oh −]. what is the value for [oh −] for the solution? in

marishachu [46]

Answer:

1.0 x 10⁻⁸ M.

Explanation:

∵ [H⁺][OH⁻] = 10⁻¹⁴.

∵ [H⁺] = 100 [OH⁻].

∴ 100 [OH⁻][OH⁻] = 10⁻¹⁴.

∴ 100 [OH⁻]² = 10⁻¹⁴.

[OH⁻]² = 10⁻¹⁴/ 100 = 1.0 x 10⁻¹⁶.

∴ [OH⁻] = √(1.0 x 10⁻¹⁶) = 1.0 x 10⁻⁸ M.

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2 years ago