Based on the information in the table, which elements are most likely in the same periods of the periodic table?

Chemistry

2 answers:

daser333 [38]3 years ago

3 0

The answer is A.<span>Boron and carbon are likely together in one period because they have very close atomic numbers, while gallium and germanium are likely together in another period because they have very close atomic numbers.
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Stells [14]3 years ago

3 0

The element that are most likely in the same period of periodic table is

<em> Boron and carbon are likely together in one period because they have very close atomic number, while gallium and germanium are likely together in another period because they have very close atomic numbers ( answer A)</em>

<u>Explanation</u>

Element in same period have the close atomic number .
The atomic number of an element is determined by number of protons the element have.
The number of proton are equal to number of electrons

Therefore boron is in atomic number 5 with 2.3 electronic configuration while carbon is in atomic number 6 with 2.4 electron configuration

since both boron and carbon have two energy level they are in period 2.

Gallium is in atomic number 31 with 2.8.8.8.5 electron configuration while Germanium (Ge) is in atomic number 32 with 2.8.8.8.6 electron configuration.

Since both gallium and germanium has 5 energy level they are in same period (period 5)

for example Aluminum,boron and gallium are in group (iii) since they have 3 valence electrons.

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If fluorine gas (F₂) occupies a volume of 45.5 L at a pressure of 850

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Taking into account about the ideal gas law, the mass of fluorine gas is 63.2244 grams.

<h3>What is ideal gas law</h3>

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where:

P is the gas pressure.
V is the volume that occupies.
T is its temperature. The universal constant of ideal gases R has the same value for all gaseous substances.
R is the ideal gas constant.
n is the number of moles of the gas.

<h3>Definition of molar mass</h3>

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

<h3>Mass of fluorine gas</h3>

In this case, you know:

P= 850 mmHg= 1.11842 atm (being 1 mmHg= 0.00131579 atm)
V= 45.5 L
T =100 °C= 373 K (being 0°C= 273 K)
R= 0.082 $\frac{atm L}{mol K}$
n= ?

Replacing in the ideal gas law:

1.11842 atm ×45.5 L = n×0.082 $\frac{atm L}{mol K}$ × 373 K

Solving:

n= (1.11842 atm ×45.5 L)÷ (0.082 $\frac{atm L}{mol K}$ × 373 K)

<u><em>n= 1.6638 moles</em></u>

The molar mass of F₂ is 38 g/mole. Then you can apply the folowing rule of three: If by definition of molar mass 1 mole of the compound contains 38 grams, 1.6638 moles of the compound contains how much mass?

$mass= \frac{1.6638 molesx38 grams}{1 mole}$